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Modified Stem Cell Transplant Procedure to Treat Patients With Blood and Immune System Cancers

19 de agosto de 2021 actualizado por: Ronald Gress, M.D., National Cancer Institute (NCI)

A Pilot Study of EPOCH-F/R Induction Chemotherapy and Reduced-Intensity, HLA-Matched, Related Allogeneic Hematopoietic Stem Cell Transplantation, With Cyclosporine & Methotrexate GVHD Prophylaxis for Refractory or Relapsed Hematologic Malignancies

This study will investigate the safety and effectiveness of a modified stem cell transplant procedure for treating cancers of the blood and immune system. Patients with cancers and pre-cancerous conditions originating in blood or immune system cells can sometimes benefit greatly from, and even be cured by, transplants of stem cells (cells produced by the bone marrow that mature into blood cells). In addition to producing new bone marrow and restoring normal blood production and immunity, the donated cells fight any residual tumor cells that might have remained in the body, in what is called a graft-versus-tumor effect.

However, severe problems, and sometimes death, may follow these transplants as a result of the high-dose chemotherapy and radiation that accompany the procedure. Also, donated immune system cells called T cells sometimes attack healthy tissues in a reaction called graft-versus-host-disease (GVHD), damaging organs such as the liver, intestines and skin. This study will use the following strategies to try to reduce these risks:

  • induction chemotherapy to reduce patient's immunity in an attempt to prevent rejection of the donated stem cells;
  • reduced-intensity conditioning chemotherapy that is easier for the body to tolerate and involves a shorter period of complete immune suppression;
  • donation of immune cells called T helper type 2 (Th2) cells instead of T cells to try to reduce the risk of serious GVHD;
  • treatment with methotrexate and cyclosporine to try to reduce the risk of serious GVHD.

Patients between 12 and 75 years of age with non-Hodgkin's lymphoma, Hodgkin's lymphoma, multiple myeloma, chronic lymphocytic leukemia, chronic myelogenous leukemia, acute myelogenous leukemia, acute lymphocytic leukemia, myelodysplasia, idiopathic myelofibrosis, polycythemia vera, or chronic myelomonocytic leukemia may be eligible for this study. Candidates will have a medical history, physical and dental examinations, blood and urine tests (including a blood test for genetic match with the donor), lung and heart function tests, and X-ray studies. A bone marrow biopsy may be done to evaluate disease status. Patients with lymphoma may have a nuclear medicine test called a positron emission tomography (PET) scan.

Participants will have a central venous line (large plastic tube) placed into a major vein. This tube can stay in the body and be used during the entire treatment period to deliver the donated stem cells and give medications, including chemotherapy and other drugs, antibiotics and blood transfusions, and to withdraw blood samples. Treatment will start with induction chemotherapy, which will include the drugs fludarabine, cyclophosphamide, etoposide, doxorubicin, vincristine, and prednisone. Some patients may also receive an antibody called rituximab. Patients will receive one to three cycles of this treatment, depending on their response to the drugs. (One cycle consists of 5 days on drug therapy followed by a 16-day rest period.) Several days before the transplant procedure, patients will start conditioning chemotherapy with cyclophosphamide and fludarabine. Three days after the conditioning therapy is completed, the stem cells will be infused. To help prevent GVHD, patients will take four doses of methotrexate (by vein) shortly after the transplant, and cyclosporine (by mouth or by vein) for about 6 months after the transplant.

The average hospital stay for stem cell transplantation is 3 to 4 weeks. After discharge, patients will return for frequent follow-up visits for 3 months. Monthly visits will be scheduled for the next 3 months, then every 3 months for the next 18 months, and less frequently for a total of at least 5 years post-transplant. These visits will include bone marrow aspirates and biopsies, blood draws, and other tests to monitor disease status.

Descripción general del estudio

Descripción detallada

Allogeneic hematopoietic stem cell transplantation (HSCT) is potentially curative for refractory hematologic malignancies, but its application has been limited historically by morbidity and mortality from conventional transplant preparative regimens and graft-versus-host disease (GVHD). Donor T cells mediate GVHD and also help to eradicate malignancies through an immune-dependent graft-versus-tumor effect. Efforts to decrease preparative regimen toxicity have led to reduced-intensity or 'nonmyeloablative' regimens, facilitating the study of allogeneic HSCT in a broader population. As a promising strategy for reducing GVHD, donor T helper type 2 (Th2) cells were shown to abrogate T helper type 1 (Th1)-mediated GVHD without impairing engraftment in murine models of allogeneic HSCT. These findings led to a phase I/II clinical study of donor Th2 cells for the prevention of GVHD during reduced-intensity allogeneic HSCT (CC 99-C-0143); preliminary results suggest that a randomized trial will be necessary to evaluate donor Th2 cells further.

In CC 99-C-0143, a novel induction chemotherapy regimen, etoposide phosphate, prednisone, vincristine sulfate, cyclophosphamide, and doxorubicin hydrochloride (EPOCH)-Fludarabine (EPOCH-F), was well tolerated and effective for sequential host immune depletion. However, a significant proportion of patients failed to achieve satisfactory disease control before transplant, providing a basis for intensifying this induction regimen. Furthermore, the initial 20 patients treated on this study experienced relatively high rates of acute GVHD and considerable morbidity associated with cyclosporine monotherapy for GVHD prevention, indicating that future studies should use more aggressive prophylaxis. These observations warrant modifying our approach to allogeneic HSCT before undertaking a randomized study of donor Th2 cells.

We now propose a pilot study of human leukocyte antigens (HLA)-matched, related, reduced-intensity allogeneic HSCT in refractory hematologic malignancies, using an intensified etoposide, vincristine, doxorubicin, prednisone, cyclophosphamide and fludarabine (EPOCH-F) induction chemotherapy regimen with rituximab added for patients with cluster of differentiation 20 (CD20)+ malignancies fludarabine, etoposide, prednisone, vincristine, cyclophosphamide, and doxorubicin plus with or without rituximab (DA-EPOCH-F/R). This regimen will be evaluated for toxicity and disease control before transplantation. GVHD prophylaxis will consist of a standard dual-agent regimen, cyclosporine/methotrexate; the impact of this change on hematopoietic recovery, donor/recipient chimerism, and the incidence of acute GVHD will be assessed.

Immune reconstitution following allogeneic HSCT is an important research interest among Experimental Transplantation and Immunology Branch Investigators. Current evidence suggests a critical role for interleukin-7 (IL-7) in cluster of differentiation 4 (CD4)+ T cell homeostasis, and interleukin-15 (IL-15) appears crucial to cluster of differentiation 8 (CD8)+ T cell and NK cell homeostasis. The relationships between these cytokines and lymphocyte subpopulations have not been studied in the setting of allogeneic HSCT; such analysis may enhance our understanding of engraftment kinetics, graft-versus-host disease, and immune reconstitution. We will correlate serum IL-7 and IL-15 levels with changes in circulating T-cell and natural killer (NK)-cell subpopulations during EPOCH-F/R induction chemotherapy, after transplantation, and with the development of GVHD.

Tipo de estudio

Intervencionista

Inscripción (Actual)

62

Fase

  • Fase 2

Contactos y Ubicaciones

Esta sección proporciona los datos de contacto de quienes realizan el estudio e información sobre dónde se lleva a cabo este estudio.

Ubicaciones de estudio

    • Maryland
      • Bethesda, Maryland, Estados Unidos, 20892
        • National Institutes of Health Clinical Center, 9000 Rockville Pike

Criterios de participación

Los investigadores buscan personas que se ajusten a una determinada descripción, denominada criterio de elegibilidad. Algunos ejemplos de estos criterios son el estado de salud general de una persona o tratamientos previos.

Criterio de elegibilidad

Edades elegibles para estudiar

18 años a 75 años (Adulto, Adulto Mayor)

Acepta Voluntarios Saludables

No

Géneros elegibles para el estudio

Todos

Descripción

  • INCLUSION CRITERIA:

Inclusion Criteria Patient (Recipient):

Patients with hematologic malignancies, myelodysplasia, or myeloproliferative disorders, as summarized below:

Disease: Chronic Lymphocytic Leukemia; Disease Status: (a) Relapse post-fludarabine, (b) Non-Complete Remission (CR) after salvage regimen; Age: 18 to 75.

Disease: Hodgkin's and Non-Hodgkin's Lymphoma (all types, including Mantle Cell Lymphoma); Disease Status: (a) Primary treatment failure, (b) Relapse after autologous stem cell transplant (SCT), (c) Hepatosplenic gamma/delta T cell lymphoma; Age: 18 to 75.

Disease: Multiple Myeloma; Disease Status: (a) Primary treatment failure, (b) Relapse after autologous SCT, (c) Non-CR after salvage regimen; Age: 18 to 75.

Disease: Acute Myelogenous Leukemia; Disease Status: (a) In Complete Remission #1, with high-risk cytogenetics [abnormalities other than t(8;21), t(15;17), or inv(16)], (b) In Complete Remission #2 or greater; Age: 18 to 75.

Disease: Acute Lymphocytic Leukemia; Disease Status: (a) In Complete Remission #1, with high-risk cytogenetics [t(9;22) or bcr-abl rearrangement; t(4;11), 1(1;19), t(8;14)], (b) In Complete Remission #2 or greater; Age: 18 to 75.

Disease: Myelodysplastic Syndrome; Disease Status: (a) refractory anemia with excess blasts (RAEB), (b) refractory anemia with excess blasts in transformation (RAEB-T) (if blasts are less than 10% in marrow and blood after induction chemotherapy); Age: 18 to 75.

Disease: Myeloproliferative disorders; Disease Status: (a) Idiopathic myelofibrosis, (b) Polycythemia vera, (c) Essential thrombocytosis, (d) Chronic myelomonocytic leukemia; Age: 18 to 75.

Disease: Chronic Myelogenous Leukemia (CML); Disease Status: (a) Chronic phase CML, (b) Accelerated phase CML; Age 50 to 75; (c) Not eligible for myeloablative allogeneic HSCT; Age: 18 to 50.

Patients 18-75 years of age. Patients older than 75 years of age will be considered on an individual basis.

Consenting first degree relative matched at 6/6 human leukocyte antigen (HLA) antigens (A, B, and DR).

Patient or legal guardian must be able to give informed consent.

All previous therapy must be completed at least 2 weeks prior to study entry, and any grade 3 or 4 non-hematologic toxicity of previous therapy must be resolved to grade 2 or less, unless specified elsewhere.

Eastern Cooperative Oncology Group (ECOG) performance status equal to 0 or 1.

Life expectancy of at least 3 months.

Patients with acute leukemia must be in hematologic remission, defined as less than 5% blasts present in blood or bone marrow.

Left ventricular ejection fraction greater than 45% by either multi-gated acquisition (MUGA) scan or 2-D echo, obtained within 28 days of enrollment. The cumulative dose of doxorubicin received by patients will not be considered, as the cardiac ejection fraction appears to indicate the safe cumulative doxorubicin dose in the setting of etoposide phosphate, prednisone, vincristine, cyclophosphamide, and doxorubicin hydrochloride (EPOCH)-based chemotherapy.

Diffusing capacity for carbon monoxide (DLCO) greater than 50% of the expected value when correlated for hemoglobin (Hb), obtained within 28 days of enrollment.

Creatinine less than or equal to 1.5 mg/dl and creatinine clearance greater than or equal to 50 ml/min/1.73 m(2).

Serum total bilirubin less than 2.5 mg/dl, and serum alanine aminotransferase (ALT) and aspartate aminotransferase (AST) values less than or equal to 2.5 times the upper limit of normal. Values above these levels may be accepted, at the discretion of the principal investigator (PI) or study chairman, if such elevations are thought to be due to liver involvement by malignancy. If these values do not normalize during induction chemotherapy, such patients will not be eligible for the transplant phase of the protocol, and will thus be taken off study.

Minimum absolute neutrophil count of 1,000 cells/microliter and minimum platelet count (without transfusion) of 20,000/mm(3).

Inclusion Criteria Donor:

First-degree relative with genotypic identity at 6/6 HLA loci (HLA-A, B and DR).

Ability to give informed consent. For donors under 18 years of age, the donor must complete an assent form, and the donors legal guardian must complete an informed consent form.

Age 12-75 years. As the potential cerebrovascular and cardiac complications may potentially increase with age, age 75 has been chosen arbitrarily as the upper age limit. However, if it is determined after initial accrual of patients in this upper age range that this procedure is relatively safe, the age range may be extended.

Adequate venous access for peripheral apheresis, or consent to use a temporary central venous catheter for apheresis.

Donors must be human immunodeficiency virus (HIV) negative, hepatitis B surface antigen negative, and hepatitis C antibody negative. This is to prevent the possible transmission of these infections to the recipient.

A donor who is lactating must substitute formula feeding for her infant during the period of cytokine administration. Filgrastim may be secreted in human milk, although its bioavailability from this source is not known. Limited clinical data suggest that short-term administration of filgrastim or sargramostim to neonates is not associated with adverse outcomes.

EXCLUSION CRITERIA:

Exclusion Criteria Patient:

Active infection that is not responding to antimicrobial therapy.

Active central nervous system (CNS) involvement by malignancy.

HIV infection. There is theoretical concern that the degree of immune suppression associated with the treatment may result in progression of HIV infection.

Chronic active hepatitis B. Patients may be hepatitis B core antibody positive but must be surface antigen negative and without evidence of active infection.

Hepatitis C infection.

Pregnant or lactating. Patients of childbearing potential must use an effective method of contraception. The effects of chemotherapy, the subsequent transplant and the medications used after the transplant are highly likely to be harmful to a fetus. The effects upon breast milk are also unknown and may be harmful to the infant.

History of psychiatric disorder which may compromise compliance with transplant protocol, or which does not allow for appropriate informed consent (as determined by principal investigator or study chairman).

Exclusion Criteria Donor:

History of psychiatric disorder which may compromise compliance with transplant protocol, or which does not allow for appropriate informed consent.

History of hypertension that is not controlled by medication, stroke, or severe heart disease. Individuals with symptomatic angina will be considered to have severe heart disease will not be eligible to be a donor.

No other medical contraindications to stem cell donation (i.e. severe atherosclerosis, autoimmune disease, cerebrovascular accident, prior malignancy). Patients with a history of coronary artery bypass grafting or angioplasty will receive a cardiology evaluation and be considered on a case-by-case basis. Persons with a history of non-hematologic malignancy must have undergone potentially curative therapy for that malignancy and (1) have had no evidence of that disease for 5 years, and/or (2) be deemed at low risk for recurrence (less than or equal to 20% at 5 years). Such persons will be considered eligible for stem cell donation at the discretion of the principal investigator. Prospective donors with a history of non-hematologic malignancy who have received potentially curative therapy and are in remission, but whose estimated risk of recurrence is greater than 20% at 5 years, will be considered on an individual basis in consultation with the National Cancer Institute (NCI) Institutional Review Board (IRB).

Donors must not be pregnant. The effects of cytokine administration on a fetus are unknown. Donors of childbearing potential must use an effective method of contraception.

Anemia (Hb less than 11 gm/dl) or thrombocytopenia (platelets less than 100,000 per microliter).

Plan de estudios

Esta sección proporciona detalles del plan de estudio, incluido cómo está diseñado el estudio y qué mide el estudio.

¿Cómo está diseñado el estudio?

Detalles de diseño

  • Propósito principal: Tratamiento
  • Asignación: No aleatorizado
  • Modelo Intervencionista: Asignación de un solo grupo
  • Enmascaramiento: Ninguno (etiqueta abierta)

Armas e Intervenciones

Grupo de participantes/brazo
Intervención / Tratamiento
Otro: Donor
Donors will undergo apheresis to collect stem cells for a stem cell transplant for the recipient.
Donors will undergo apheresis to collect stem cells for a stem cell transplant for the recipient.
Otros nombres:
  • extracorporeal therapy
Experimental: Recipient
Recipients will receive induction chemotherapy (one cycle is 5 days on drug therapy followed by a 16 day rest period). Prior to the transplant procedure, recipients will receive conditioning therapy followed by the infusion of donor stem cells.
Recipients will receive donor stem cells 3 days after conditioning therapy is completed.
Otros nombres:
  • hematopoietic stem cell transplant (HSCT)
Recipients will receive induction therapy with fludarabine, cyclophosphamide, etoposide, doxorubicin, vincristine, and prednisone. One cycle is 5 days on drug therapy followed by a 16 day rest period.
Otros nombres:
  • Fludara
Recipients will receive induction therapy with fludarabine, cyclophosphamide, etoposide, doxorubicin, vincristine, and prednisone. One cycle is 5 days on drug therapy followed by a 16 day rest period.
Otros nombres:
  • Citoxano
Recipients will receive induction therapy with fludarabine, cyclophosphamide, etoposide, doxorubicin, vincristine, and prednisone. One cycle is 5 days on drug therapy followed by a 16 day rest period.
Otros nombres:
  • Toposar
Recipients will receive induction therapy with fludarabine, cyclophosphamide, etoposide, doxorubicin, vincristine, and prednisone. One cycle is 5 days on drug therapy followed by a 16 day rest period.
Otros nombres:
  • Doxil
Recipients will receive induction therapy with fludarabine, cyclophosphamide, etoposide, doxorubicin, vincristine, and prednisone. One cycle is 5 days on drug therapy followed by a 16 day rest period.
Otros nombres:
  • Oncovin
Recipients will receive induction therapy with fludarabine, cyclophosphamide, etoposide, doxorubicin, vincristine, and prednisone. One cycle is 5 days on drug therapy followed by a 16 day rest period.
Otros nombres:
  • Deltasona
Recipients will receive 4 doses of methotrexate by vein after the transplant to help prevent graft-versus-host disease (GVHD)..
Otros nombres:
  • Rasuvo
Recipients will receive cyclosporine by vein or by mouth for about 6 months after the transplant to help prevent graft-versus-host disease (GVHD).
Otros nombres:
  • Neoral

¿Qué mide el estudio?

Medidas de resultado primarias

Medida de resultado
Medida Descripción
Periodo de tiempo
Number of Recipients Who Developed Grades I-IV Acute Graft Versus Host Disease (GVHD) Following a Combination of Cyclosporine and a Mini-dose Methotrexate Regimen for Graft Versus Host Disease (GVHD) Prophylaxis
Periodo de tiempo: At least 100 days of follow-up post reduced-intensity stem cell transplantation (RIST)
Here is the number of recipients who developed grades I-IV acute graft versus host disease (GVHD) following a combination of cyclosporine and a mini-dose methotrexate regimen for graft-versus-host disease (GVHD) prophylaxis. Grades I-IV acute GVHD clinical staging was assessed by the Glucksberg Criteria. Grade I-IV acute GVHD can occur in the skin, liver, and/or gut. Grade 1: rash < 25% body surface area (BSA), total bilirubin 2-3 mg/dl, and diarrhea 500-1000 ml/d. Grade 2: 25-50% BSA, total bilirubin 3-6 mg/dl, and diarrhea 1000-1500 ml/d. Grade 3: generalized erythroderma, total bilirubin 6-15 mg/dl, and diarrhea >1500 ml/d. Grade 4: desquamation and bullae, total bilirubin >15 mg/dl, and pain +/- ileus.
At least 100 days of follow-up post reduced-intensity stem cell transplantation (RIST)
Number of Recipients Who Developed Chronic Graft Versus Host Disease (GVHD) Following a Combination of Cyclosporine and a Mini-dose Methotrexate Regimen for Graft Versus Host Disease (GVHD) Prophylaxis
Periodo de tiempo: At least 100 days of follow-up post reduced-intensity stem cell transplantation (RIST)
Here is the number of recipients who developed chronic graft versus host disease (GVHD) following a combination of cyclosporine and a mini-dose methotrexate regimen for graft-versus-host disease (GVHD) prophylaxis. Grades I-IV chronic GVHD clinical staging was assessed by the Glucksberg Criteria. Grade I-IV chronic GVHD can occur in the skin, liver, and/or gut. Grade 1: rash < 25% body surface area (BSA), total bilirubin 2-3 mg/dl, and diarrhea 500-1000 ml/d. Grade 2: 25-50% BSA, total bilirubin 3-6 mg/dl, and diarrhea 1000-1500 ml/d. Grade 3: generalized erythroderma, total bilirubin 6-15 mg/dl, and diarrhea >1500 ml/d. Grade 4: desquamation and bullae, total bilirubin >15 mg/dl, and pain +/- ileus.
At least 100 days of follow-up post reduced-intensity stem cell transplantation (RIST)

Medidas de resultado secundarias

Medida de resultado
Medida Descripción
Periodo de tiempo
Percentage of Recipients Who Achieved Donor Chimerism at Day +14
Periodo de tiempo: Day+14
Recipients who achieved engraftment with donor chimerism. Engraftment is defined as a target peripheral blood cluster of differentiation 4 (CD4) count of 100 cells/ul after induction therapy.
Day+14
Number of Recipients Evaluable Who Achieved Full Donor Chimerism at Day+100
Periodo de tiempo: Day+100
Recipients who achieved engraftment with donor chimerism. Engraftment is defined as a target peripheral blood cluster of differentiation 4 (CD4) count of 100 cells/ul after induction therapy.
Day+100
Median Cycles of Induction Chemotherapy With Fludarabine, Cyclophosphamide, Etoposide, Doxorubicin, Vincristine, and Prednisone Given to Recipients
Periodo de tiempo: Up to cycle 3
Median cycles of induction chemotherapy with fludarabine, cyclophosphamide, etoposide, doxorubicin, vincristine, and prednisone given to recipients.
Up to cycle 3
Median Time to Neutrophil Recovery
Periodo de tiempo: Up to 2 months after stem cell transplant
Neutrophil recovery is defined as a neutrophil count ≥5000 µl for three consecutive days.
Up to 2 months after stem cell transplant
Median Time to Platelet Recovery
Periodo de tiempo: Up to 2 months after stem cell transplant
Platelet recovery is defined as >50,000 mm3 platelet cell count after transfusion.
Up to 2 months after stem cell transplant
Number of Recipients With a Response to Reduced-intensity Stem Cell Transplantation (RIST)
Periodo de tiempo: At least 100 days after post reduced-intensity stem cell transplantation (RIST).
Complete remission (CR) is complete disappearance of all detectable signs and symptoms of lymphoma for a period of at least one month. Complete remission unconfirmed (CRu) is a residual lymph node mass > 1.5 cm in greatest transverse diameter will be considered CRu if it has regressed by more than 75% in the SPD, does not change over at least one month, is negative by PET or gallium, and is negative on any biopsies obtained (biopsy not required). Progressive disease (PD) is a 25% or greater increase in SPD of all measured lesions compared to the smallest previous measurements, or appearance of any new lesion(s).
At least 100 days after post reduced-intensity stem cell transplantation (RIST).

Otras medidas de resultado

Medida de resultado
Medida Descripción
Periodo de tiempo
Number of Recipients With Non-serious Adverse Events
Periodo de tiempo: Date treatment consent signed to date off study, approximately 58 months and 13 days.
Here is the number of recipients with non-serious adverse events assessed by the Common Toxicity Criteria version 2.0. A non-serious adverse event is any untoward medical occurrence.
Date treatment consent signed to date off study, approximately 58 months and 13 days.

Colaboradores e Investigadores

Aquí es donde encontrará personas y organizaciones involucradas en este estudio.

Investigadores

  • Investigador principal: Daniel H Fowler, M.D., National Cancer Institute (NCI)

Publicaciones y enlaces útiles

La persona responsable de ingresar información sobre el estudio proporciona voluntariamente estas publicaciones. Estos pueden ser sobre cualquier cosa relacionada con el estudio.

Fechas de registro del estudio

Estas fechas rastrean el progreso del registro del estudio y los envíos de resultados resumidos a ClinicalTrials.gov. Los registros del estudio y los resultados informados son revisados ​​por la Biblioteca Nacional de Medicina (NLM) para asegurarse de que cumplan con los estándares de control de calidad específicos antes de publicarlos en el sitio web público.

Fechas importantes del estudio

Inicio del estudio (Actual)

3 de enero de 2003

Finalización primaria (Actual)

25 de septiembre de 2014

Finalización del estudio (Actual)

25 de septiembre de 2014

Fechas de registro del estudio

Enviado por primera vez

8 de enero de 2003

Primero enviado que cumplió con los criterios de control de calidad

7 de enero de 2003

Publicado por primera vez (Estimar)

8 de enero de 2003

Actualizaciones de registros de estudio

Última actualización publicada (Actual)

9 de septiembre de 2021

Última actualización enviada que cumplió con los criterios de control de calidad

19 de agosto de 2021

Última verificación

1 de agosto de 2021

Más información

Términos relacionados con este estudio

Plan de datos de participantes individuales (IPD)

¿Planea compartir datos de participantes individuales (IPD)?

NO

Información sobre medicamentos y dispositivos, documentos del estudio

Estudia un producto farmacéutico regulado por la FDA de EE. UU.

Estudia un producto de dispositivo regulado por la FDA de EE. UU.

No

Esta información se obtuvo directamente del sitio web clinicaltrials.gov sin cambios. Si tiene alguna solicitud para cambiar, eliminar o actualizar los detalles de su estudio, comuníquese con register@clinicaltrials.gov. Tan pronto como se implemente un cambio en clinicaltrials.gov, también se actualizará automáticamente en nuestro sitio web. .

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