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

19 agosto 2021 aggiornato da: 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.

Panoramica dello studio

Descrizione dettagliata

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 di studio

Interventistico

Iscrizione (Effettivo)

62

Fase

  • Fase 2

Contatti e Sedi

Questa sezione fornisce i recapiti di coloro che conducono lo studio e informazioni su dove viene condotto lo studio.

Luoghi di studio

    • Maryland
      • Bethesda, Maryland, Stati Uniti, 20892
        • National Institutes of Health Clinical Center, 9000 Rockville Pike

Criteri di partecipazione

I ricercatori cercano persone che corrispondano a una certa descrizione, chiamata criteri di ammissibilità. Alcuni esempi di questi criteri sono le condizioni generali di salute di una persona o trattamenti precedenti.

Criteri di ammissibilità

Età idonea allo studio

Da 18 anni a 75 anni (Adulto, Adulto più anziano)

Accetta volontari sani

No

Sessi ammissibili allo studio

Tutto

Descrizione

  • 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).

Piano di studio

Questa sezione fornisce i dettagli del piano di studio, compreso il modo in cui lo studio è progettato e ciò che lo studio sta misurando.

Come è strutturato lo studio?

Dettagli di progettazione

  • Scopo principale: Trattamento
  • Assegnazione: Non randomizzato
  • Modello interventistico: Assegnazione di gruppo singolo
  • Mascheramento: Nessuno (etichetta aperta)

Armi e interventi

Gruppo di partecipanti / Arm
Intervento / Trattamento
Altro: 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.
Altri nomi:
  • extracorporeal therapy
Sperimentale: 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.
Altri nomi:
  • 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.
Altri nomi:
  • Fludar
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.
Altri nomi:
  • Cytoxan
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.
Altri nomi:
  • 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.
Altri nomi:
  • 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.
Altri nomi:
  • 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.
Altri nomi:
  • Deltason
Recipients will receive 4 doses of methotrexate by vein after the transplant to help prevent graft-versus-host disease (GVHD)..
Altri nomi:
  • 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).
Altri nomi:
  • Neorale

Cosa sta misurando lo studio?

Misure di risultato primarie

Misura del risultato
Misura Descrizione
Lasso di tempo
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
Lasso di tempo: 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
Lasso di tempo: 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)

Misure di risultato secondarie

Misura del risultato
Misura Descrizione
Lasso di tempo
Percentage of Recipients Who Achieved Donor Chimerism at Day +14
Lasso di tempo: 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
Lasso di tempo: 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
Lasso di tempo: 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
Lasso di tempo: 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
Lasso di tempo: 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)
Lasso di tempo: 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).

Altre misure di risultato

Misura del risultato
Misura Descrizione
Lasso di tempo
Number of Recipients With Non-serious Adverse Events
Lasso di tempo: 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.

Collaboratori e investigatori

Qui è dove troverai le persone e le organizzazioni coinvolte in questo studio.

Investigatori

  • Investigatore principale: Daniel H Fowler, M.D., National Cancer Institute (NCI)

Pubblicazioni e link utili

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Studiare le date dei record

Queste date tengono traccia dell'avanzamento della registrazione dello studio e dell'invio dei risultati di sintesi a ClinicalTrials.gov. I record degli studi e i risultati riportati vengono esaminati dalla National Library of Medicine (NLM) per assicurarsi che soddisfino specifici standard di controllo della qualità prima di essere pubblicati sul sito Web pubblico.

Studia le date principali

Inizio studio (Effettivo)

3 gennaio 2003

Completamento primario (Effettivo)

25 settembre 2014

Completamento dello studio (Effettivo)

25 settembre 2014

Date di iscrizione allo studio

Primo inviato

8 gennaio 2003

Primo inviato che soddisfa i criteri di controllo qualità

7 gennaio 2003

Primo Inserito (Stima)

8 gennaio 2003

Aggiornamenti dei record di studio

Ultimo aggiornamento pubblicato (Effettivo)

9 settembre 2021

Ultimo aggiornamento inviato che soddisfa i criteri QC

19 agosto 2021

Ultimo verificato

1 agosto 2021

Maggiori informazioni

Termini relativi a questo studio

Piano per i dati dei singoli partecipanti (IPD)

Hai intenzione di condividere i dati dei singoli partecipanti (IPD)?

NO

Informazioni su farmaci e dispositivi, documenti di studio

Studia un prodotto farmaceutico regolamentato dalla FDA degli Stati Uniti

Studia un dispositivo regolamentato dalla FDA degli Stati Uniti

No

Queste informazioni sono state recuperate direttamente dal sito web clinicaltrials.gov senza alcuna modifica. In caso di richieste di modifica, rimozione o aggiornamento dei dettagli dello studio, contattare register@clinicaltrials.gov. Non appena verrà implementata una modifica su clinicaltrials.gov, questa verrà aggiornata automaticamente anche sul nostro sito web .

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