Safety and Immunogenicity of Norovirus GI.1/GII.4 Bivalent Virus-Like Particle Vaccine in an Elderly Population

April 22, 2020 updated by: Takeda

A Phase II, Randomized, Double-blind, Safety and Immunogenicity Trial of Norovirus GI.1/GII.4 Bivalent Virus-Like Particle Vaccine in Healthy Elderly Adults

The purpose of this study is to further develop a formulation and dose regimen of the norovirus GI.1/GII.4 bivalent virus-like particle (VLP) vaccine that is immunogenic and safe in an elderly population aged 60 years and above.

Study Overview

Detailed Description

The vaccine being tested in this study is called norovirus GI.1/GII.4 bivalent virus-like particle (VLP) vaccine adjuvanted with aluminum hydroxide (Formulation A) or adjuvanted with monophosphoryl lipid A (MPL) and aluminum hydroxide (Formulation B). Two norovirus vaccine formulations are being tested to select for further development the formulation that will generate an optimal specific antibody response that may provide protection against norovirus and is safe in a population aged 60 years and above. This study will look at side effects and the level of antibodies to norovirus formed in people who will be injected with different formulations of the norovirus vaccine candidate.

The study will enroll approximately 325 patients. Participants will be randomly assigned (by chance) to one of five treatment groups.

  • Norovirus GI.1/GII.4 bivalent VLP vaccine (Formulation A) 1-dose, participants ≥ 60 years
  • Norovirus GI.1/GII.4 bivalent VLP vaccine (Formulation A) 2-dose, participants ≥ 60 years
  • Norovirus GI.1/GII.4 bivalent VLP vaccine (Formulation B) 1-dose, participants ≥ 60 years
  • Norovirus GI.1/GII.4 bivalent VLP vaccine (Formulation B) 2-dose, participants ≥ 60 years
  • Norovirus GI.1/GII.4 bivalent VLP vaccine (Formulation A) 1-dose, participants 18 to 49 years All participants in the age of 60 years and older will be administered either NoV vaccine (Formulation A or B) or placebo on Day 1 and NoV vaccine (Formulation A or B) on Day 29 of the study. In order to keep the treatment arms undisclosed to the patient and the doctor, those randomized to the one dose groups will receive a dose of placebo (this is a saline solution that has no active ingredient) on Day 1 followed by the NoV vaccine on Day 29. Those randomized to 2 doses with receive the NoV vaccine on Day 1 and Day 29. In case of an urgent medical need a participant can be unblinded.

Adults aged 18 to 49 will receive placebo on Day 1 followed by NoV vaccine Formulation A on Day 29.

Participants will be asked to record any reactions/ symptoms that may be related or not to the vaccine in a diary card for 28 days after each vaccination.

This multi-center trial will be conducted in the United States of America. The overall time to participate in this study is up to 393 days. Participants will make multiple visits to the clinic including a final follow-up visit on Day 393.

Study Type

Interventional

Enrollment (Actual)

320

Phase

  • Phase 2

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

    • Alabama
      • Birmingham, Alabama, United States, 35211
        • Simon Williamson Clinic
    • Arizona
      • Fountain Hills, Arizona, United States, 85268
        • Fountain Hills Family Practice, P.C.
    • Colorado
      • Littleton, Colorado, United States, 80127
        • Southwest Family Medicine
    • Florida
      • Miami, Florida, United States, 33143
        • Miami Research Associates
    • Kansas
      • Lenexa, Kansas, United States, 66219
        • Johnson County Clin-Trials
    • Missouri
      • Saint Louis, Missouri, United States, 63104
        • St. Louis University, School of Medicine
    • New York
      • Endwell, New York, United States, 13760
        • Regional Clinical Research Inc.
      • Rochester, New York, United States, 14642
        • University of Rochester
    • Ohio
      • Cincinnati, Ohio, United States, 45229-3039
        • Cincinnati Childrens Hospital Medical Center
    • Washington
      • Seattle, Washington, United States, 98101
        • Group Health Research Institute

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

All

Description

Inclusion Criteria:

  1. Is aged 18 to 49 years, or 60 years and older at the time of enrollment;
  2. Participants who are in good health, or in stable health status with no exclusionary medical or neuropsychiatric conditions at the time of entry into the trial as determined by medical history, physical examination (including vital signs) and clinical judgment of the Investigator;
  3. Participant signs and dates a written, Informed Consent Form (ICF) and any required privacy authorization prior to the initiation of any trial procedures, after the nature of the trial has been explained according to local regulatory requirements;
  4. Participants who can comply with trial procedures and are available for the duration of follow-up.

Exclusion Criteria:

  1. Has a known hypersensitivity or allergy to any of the Norovirus (NoV) GI.1/GII.4 Bivalent virus-like particle (VLP) Vaccine components;
  2. Has a clinically significant active infection (as assessed by the Investigator) or body temperature ≥38°C/100.4°F within 3 days of the intended date of vaccination;
  3. Participants with the presence of significant acute or chronic, uncontrolled medical or neuropsychiatric illness. Uncontrolled was defined as:

    Requiring institution of new medical or surgical treatment within 3 months prior to immunization, or Requiring a change in medication dosage in the 3 months prior to immunization due to uncontrolled symptoms or drug toxicity (elective dosage adjustments in stable participants were acceptable), or Hospitalization or an event fulfilling the definition of a serious adverse event within 3 months prior immunization.

  4. Has any unstable medical or neuropsychiatric condition, which in the Investigator's opinion poses a risk of unusual magnitude for the participant's age group of hospitalization, death, or an event meeting the definition of a serious adverse event within 2 months of immunization. The intent of this criterion is to recognize and allow for the frequent existence of significant health concerns in this population; but exclude those participants who are experiencing an acute decline in health status;
  5. Has any medical or neuropsychiatric condition, which in the Investigator's opinion, rendered the participant incompetent to provide informed consent or unable to provide valid safety observations and reports;
  6. Has behavioral or cognitive impairment or psychiatric disease that, in the opinion of the Investigator, may interfere with the participant's ability to participate in the trial;
  7. Participants with any history of progressive or severe neurologic disorder, history of seizure, or history of neuro-inflammatory disease (e.g. Guillain-Barre syndrome);
  8. Participants with history or any illness that, in the opinion of the Investigator, might interfere with the results of the trial or pose additional risk to the participants due to participation in the trial;
  9. Has known or suspected autoimmune disease;
  10. Has known or suspected impairment/alteration of immune function, including:

    Chronic use of oral steroids (Equivalent to 20 mg/day prednisone ≥ 12 weeks/≥ 2 mg/kg body weight/day prednisone ≥ 2 weeks) within 60 days prior to Day 1 (use of inhaled, intranasal, or topical corticosteroids is allowed).

    Receipt of parenteral steroids (Equivalent to 20 mg/day prednisone ≥ 12 weeks/≥ 2 mg/kg body weight/day prednisone ≥ 2 weeks) within 60 days prior to Day 1.

    Receipt of immunosuppressive therapy within 3 months prior to Day 1. Receipt of immunostimulants within 60 days prior to Day 1. Receipt of parenteral, epidural or intra-articular immunoglobulin preparation, blood products, and/or plasma derivatives within 3 months prior to Day 1 or planned during the full length of the trial.

    Human Immunodeficiency Virus (HIV) infection or HIV-related disease. Genetic immunodeficiency.

  11. Has abnormalities of splenic or thymic function;
  12. Has any significant disorder of coagulation or treatment with anticoagulant therapy that would increase the risk of intramuscular (IM) injection. Persons receiving prophylactic antiplatelet medication such as low dose of acetylsalicylic acid are eligible;
  13. Has any serious chronic or progressive disease according to judgment of the Investigator: cancer (malignancy other than resolved/excised skin lesion), insulin dependent Type I diabetes (Type II diabetes is accepted), cardiac, renal or hepatic disease;
  14. Has body mass index (BMI) greater than or equal to 35 kg/m^2 (= weight in kg/[height in meters^2]);
  15. Is participating in any clinical trial with another investigational product 30 days prior to first trial visit or intent to participate in another clinical trial at any time during the conduct of this trial;
  16. Participants who received any other vaccines within 14 days (for inactivated vaccines) or 28 days (for live vaccines) prior to enrollment in this trial or who are planning to receive any vaccine within 28 days of investigational vaccine administration;
  17. Participants involved in trial conduct or their first degree relatives;
  18. Has history of substance or alcohol abuse within the past 2 years;
  19. Females who are pregnant or breastfeeding;
  20. If female of childbearing potential, sexually active with a male partner who has not been sterilized, and has not used any of the "acceptable contraceptive methods" for at least 2 months prior to trial entry:

    Of childbearing potential is defined as status post onset of menarche and not meeting any of the following conditions: menopausal for at least 2 years, status after bilateral tubal ligation for at least 1 year, status after bilateral oophorectomy, or status after hysterectomy.

    Acceptable birth control methods are defined as one or more of the following: i. Hormonal contraceptive (such as oral, injection, transdermal patch, implant, cervical ring); ii. Barrier (condom with spermicide or diaphragm with spermicide) each and every time during intercourse; iii. Intrauterine device (IUD); iv. Monogamous relationship with vasectomized partner. Partner must have been vasectomized for at least six months prior to the participants' trial entry.

  21. If female of childbearing potential and sexually active, refusal to use an "acceptable contraceptive method" from Day 1 and throughout the duration of the trial. In addition, they must be advised not to donate ova during this period;
  22. Females with any positive or indeterminate pregnancy test.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Prevention
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Quadruple

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Arm 1: NoV Vaccine Formulation A _1-Dose
Participants ≥ 60 years of age, 1-dose regimen: Norovirus bivalent placebo-matching vaccine, intramuscularly (IM), on Day 1, followed by norovirus (NoV) GI.1 (15 μg)/GII.4 (50 μg) bivalent virus-like particle (VLP) vaccine (Formulation A), IM, on Day 29.
Norovirus GI.1/GII.4 bivalent VLP vaccine adjuvanted with aluminum hydroxide, without MPL for IM injection
norovirus bivalent placebo-matching vaccine
Norovirus GI.1/GII.4 bivalent VLP vaccine adjuvanted with MPL and aluminum hydroxide for IM injection
Experimental: Arm 2: NoV Vaccine Formulation A _2-Dose
Participants ≥ 60 years of age, 2-dose regimen: Norovirus GI.1 (15 μg)/GII.4 (50 μg) bivalent VLP vaccine (Formulation A), IM, on Days 1 and 29.
Norovirus GI.1/GII.4 bivalent VLP vaccine adjuvanted with aluminum hydroxide, without MPL for IM injection
Norovirus GI.1/GII.4 bivalent VLP vaccine adjuvanted with MPL and aluminum hydroxide for IM injection
Experimental: Arm 3: NoV Vaccine Formulation B_1-Dose
Participants ≥ 60 years of age, 1-dose regimen: Norovirus bivalent placebo-matching vaccine, IM on Day 1, followed by norovirus GI.1 (15 μg)/GII.4 (50 μg) bivalent VLP vaccine with 15 μg monophosphoryl lipid A (MPL) (Formulation B), IM, on Day 29.
Norovirus GI.1/GII.4 bivalent VLP vaccine adjuvanted with aluminum hydroxide, without MPL for IM injection
norovirus bivalent placebo-matching vaccine
Norovirus GI.1/GII.4 bivalent VLP vaccine adjuvanted with MPL and aluminum hydroxide for IM injection
Experimental: Arm 4: NoV Vaccine Formulation B_2-Dose
Participants ≥ 60 years of age, 2-dose regimen: Norovirus GI.1 (15 μg)/GII.4 (50 μg) bivalent VLP vaccine with 15 μg MPL (Formulation B), IM, on Days 1 and 29.
Norovirus GI.1/GII.4 bivalent VLP vaccine adjuvanted with aluminum hydroxide, without MPL for IM injection
Norovirus GI.1/GII.4 bivalent VLP vaccine adjuvanted with MPL and aluminum hydroxide for IM injection
Experimental: Arm 5: NoV Vaccine Formulation A_1-Dose
Participants 18 to 49 years of age, 1-dose regimen: Norovirus bivalent placebo-matching vaccine, IM, on Day 1, followed by norovirus GI.1 (15 μg)/GII.4 (50 μg) bivalent VLP vaccine (Formulation A), IM, on Day 29.
Norovirus GI.1/GII.4 bivalent VLP vaccine adjuvanted with aluminum hydroxide, without MPL for IM injection
norovirus bivalent placebo-matching vaccine
Norovirus GI.1/GII.4 bivalent VLP vaccine adjuvanted with MPL and aluminum hydroxide for IM injection

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Percentage of Participants With a 4-Fold Rise or Greater in Serum Anti-norovirus Antibody Titers for Both GI.1 and GII.4 Virus Like Particles (VLP) as Measured by Histoblood Group Antigen (HBGA) Blocking Assay on Day 57
Time Frame: Day 57
Day 57
Percentage of Participants With Solicited Local Adverse Events (AEs) at Injection Site for 7-day Period (Including Day of Vaccination) After First Vaccination on Day 1
Time Frame: Within 7 days of first vaccination on Day 1
Solicited local AEs at the injection site that occurred within 7 days after each vaccination were collected using a diary and included pain, erythema swelling and induration.
Within 7 days of first vaccination on Day 1
Percentage of Participants With Solicited Local Adverse Events (AEs) at Injection Site for 7-day Period (Including Day of Vaccination) After Second Vaccination on Day 29
Time Frame: Within 7 days of second vaccination on Day 29
Solicited local AEs at the injection site that occurred within 7 days after each vaccination were collected using a diary and included pain, erythema, swelling and induration.
Within 7 days of second vaccination on Day 29
Percentage of Participants With Solicited Systemic Adverse Events (AEs) for 7-day Period (Including Day of Vaccination) After First Vaccination on Day 1
Time Frame: Within 7 days of first vaccination on Day 1
Solicited systemic AEs that occurred within 7 days after each vaccination were collected using a diary and included headache, fatigue, myalgia, arthralgia, vomiting, and diarrhea.
Within 7 days of first vaccination on Day 1
Percentage of Participants With Solicited Systemic Adverse Events (AEs) for 7-day Period (Including Day of Vaccination) After Second Vaccination on Day 29
Time Frame: Within 7 days of second vaccination on Day 29
Solicited systemic AEs that occurred within 7 days after each vaccination were collected using a diary and included headache, fatigue, myalgia, arthralgia, vomiting, and diarrhea.
Within 7 days of second vaccination on Day 29
Percentage of Participants With Elevated Body Temperature ≥38°C (Defined as Fever) for 7-day Period (Including Day of Vaccination) After First Vaccination on Day 1
Time Frame: Within 7 days of first vaccination on Day 1
The body temperature measurement was performed using the thermometer for 7 days after each vaccination. The highest body temperature observed each day was recorded on the diary card. An elevated temperature is ≥ 38 °C or 100.4°F (considered as fever).
Within 7 days of first vaccination on Day 1
Percentage of Participants With Elevated Body Temperature ≥38°C (Defined as Fever) for 7-day Period (Including Day of Vaccination) After Second Vaccination on Day 29
Time Frame: Within 7 days of second vaccination on Day 29
The body temperature measurement was performed using the thermometer for 7 days after each vaccination. The highest body temperature observed each day was recorded on the diary card. An elevated temperature is ≥ 38 °C or 100.4°F (considered as fever).
Within 7 days of second vaccination on Day 29
Percentage of Participants With At Least One Unsolicited Adverse Event (AE) Within 28-days After First Vaccination on Day 1
Time Frame: Within 28 days of first vaccination on Day 1
An AE is defined as any untoward medical occurrence in a clinical investigation participant administered a drug; it does not necessarily have to have a causal relationship with this treatment.
Within 28 days of first vaccination on Day 1
Percentage of Participants With At Least One Unsolicited Adverse Event (AE) Within 28-days After Second Vaccination on Day 29
Time Frame: Within 28 days of second vaccination on Day 29
An AE is defined as any untoward medical occurrence in a clinical investigation participant administered a drug; it does not necessarily have to have a causal relationship with this treatment.
Within 28 days of second vaccination on Day 29
Percentage of Participants With At Least One Serious Adverse Event (SAE)
Time Frame: From first vaccination up to Day 393
An SAE is any untoward medical occurrence that at any dose results in death, is life-threatening, requires inpatient hospitalization or prolongation of existing hospitalization, results in persistent or significant disability/incapacity, is a congenital anomaly/birth defect or is medically important due to other reasons than the above mentioned criteria.
From first vaccination up to Day 393

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Percentage of Participants With a 4-Fold Rise or Greater in Serum Anti-norovirus Antibody Titers for Both GI.1 VLP and GII.4 VLP as Measured by HBGA Blocking Assay
Time Frame: Days 8, 29, 36, 211 and 393
Days 8, 29, 36, 211 and 393
Percentage of Participants With a 4-Fold Rise or Greater in Serum Anti-norovirus GI.1 VLP Antibody Titers (HBGA)
Time Frame: Days 8, 29, 36, 57, 211 and 393
Days 8, 29, 36, 57, 211 and 393
Percentage of Participants With a 4-Fold Rise or Greater in Serum Anti-norovirus GII.4 VLP Antibody Titers (HBGA)
Time Frame: Days 8, 29, 36, 57, 211 and 393
Days 8, 29, 36, 57, 211 and 393
Geometric Mean Titer (GMT) GI.1 VLP Antibody Titers (HBGA)
Time Frame: Baseline (Day 1), Days 8, 29, 36, 57, 211 and 393
GMT GI.1 VLP antibody titers measured by HBGA blocking assay are reported.
Baseline (Day 1), Days 8, 29, 36, 57, 211 and 393
GMT of Anti-norovirus GII.4 VLP Antibody Titers (HBGA)
Time Frame: Baseline (Day 1), Days 8, 29, 36, 57, 211 and 393
GMT of anti-norovirus GII.4 VLP antibody titers measured by HBGA blocking assay are reported.
Baseline (Day 1), Days 8, 29, 36, 57, 211 and 393
Geometric Mean Fold Rise (GMFR) of Anti-norovirus GI.1 VLP Antibody Titers (HBGA)
Time Frame: Days 8, 29, 36, 57, 211 and 393
GMFR of anti-norovirus GI.1 VLP antibody titers measured by HBGA blocking assay are reported. The fold rise was calculated as the ratio of the post-vaccination titer level to the pre-vaccination titer level.
Days 8, 29, 36, 57, 211 and 393
GMFR of Anti-norovirus GII.4 VLP Antibody Titers (HBGA)
Time Frame: Days 8, 29, 36, 57, 211 and 393
GMFR of anti-norovirus GII.4 VLP antibody titers measured by HBGA blocking assay are reported. The fold rise was calculated as the ratio of the post-vaccination titer level to the pre-vaccination titer level.
Days 8, 29, 36, 57, 211 and 393
Percentage of Participants With a 4-Fold Rise or Greater in Serum Anti-norovirus Antibody Titers for Both GI.1 VLP and GII.4 VLP as Measured by Total Immunoglobulin-Enzyme-linked Immunosorbent Assay (Pan-Ig ELISA)
Time Frame: Days 8, 29, 36, 57, 211 and 393
Percentage of participants with a 4-fold rise or greater in serum anti-norovirus antibody titers for both GI.1 VLP and GII.4 VLP measured by Pan-Ig ELISA are reported.
Days 8, 29, 36, 57, 211 and 393
Percentage of Participants With a 4-Fold Rise or Greater in Serum Anti-norovirus GI.1 VLP Antibody Titers (Pan-Ig ELISA)
Time Frame: Days 8, 29, 36, 57, 211 and 393
Percentage of participants with a 4-Fold rise or greater in serum anti-norovirus GI.1 VLP antibody titers measured by Pan-Ig ELISA are reported.
Days 8, 29, 36, 57, 211 and 393
Percentage of Participants With a 4-Fold Rise or Greater in Serum Anti-norovirus GII.4 VLP Antibody Titers (Pan-Ig ELISA)
Time Frame: Days 8, 29, 36, 57, 211 and 393
Percentage of participants with a 4-fold rise or greater in serum anti-norovirus GII.4 VLP antibody titers measured by Pan-Ig ELISA are reported.
Days 8, 29, 36, 57, 211 and 393
GMT of Anti-norovirus GI.1 VLP Antibody Titers (Pan-Ig ELISA)
Time Frame: Baseline (Day 1), Days 8, 29, 36, 57, 211 and 393
GMT of anti-norovirus GI.1 VLP antibody titers measured by Pan-Ig ELISA are reported.
Baseline (Day 1), Days 8, 29, 36, 57, 211 and 393
GMT of Anti-norovirus GII.4 VLP Antibody Titers (Pan-Ig ELISA)
Time Frame: Baseline (Day 1), Days 8, 29, 36, 57, 211 and 393
GMT of anti-norovirus GII.4 VLP antibody titers measured by Pan-Ig ELISA are reported.
Baseline (Day 1), Days 8, 29, 36, 57, 211 and 393
GMFR of Anti-norovirus GI.1 VLP Antibody Titers (Pan-Ig ELISA)
Time Frame: Days 8, 29, 36, 57, 211 and 393
GMFR of anti-norovirus GI.1 VLP antibody titers measured by Pan-Ig ELISA are reported. The fold rise was calculated as the ratio of the post-vaccination titer level to the pre-vaccination titer level.
Days 8, 29, 36, 57, 211 and 393
GMFR of Anti-norovirus GII.4 VLP Antibody Titers (Pan-Ig ELISA)
Time Frame: Days 8, 29, 36, 57, 211 and 393
GMFR of anti-norovirus GII.4 VLP antibody titers measured by Pan-Ig ELISA are reported. The fold rise was calculated as the ratio of the post-vaccination titer level to the pre-vaccination titer level.
Days 8, 29, 36, 57, 211 and 393
Percentage of Participants With At Least One Adverse Event of Special Interest (AESI)
Time Frame: From first vaccination up to Day 393
AESIs are AEs that are not solicited local or systemic AEs, they are predefined AEs that required close monitoring and prompt reporting to the sponsor. AESI included protocol specified Cardiac Disorders, Gastrointestinal Disorders, Immune System Disorders, Infections and Infestations, Musculoskeletal and Connective Tissue Diseases, Neuroinflammatory Disorders, Renal and Urinary Disorders, Skin Disorders, Thyroid Disorders, Vascular Disorders and Other Disorders.
From first vaccination up to Day 393
Percentage of Participants With At Least One Adverse Event (AE) Leading to Participant's Withdrawal From the Study
Time Frame: From first vaccination up to Day 393
Withdrawal due to an AE will occur if the participant experiences an AE that requires early termination of treatment, because continued participation imposes an unacceptable risk to the participant's health or the participant is unwilling to continue because of the AE.
From first vaccination up to Day 393

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

February 1, 2016

Primary Completion (Actual)

October 28, 2016

Study Completion (Actual)

September 29, 2017

Study Registration Dates

First Submitted

January 8, 2016

First Submitted That Met QC Criteria

January 19, 2016

First Posted (Estimate)

January 22, 2016

Study Record Updates

Last Update Posted (Actual)

May 18, 2020

Last Update Submitted That Met QC Criteria

April 22, 2020

Last Verified

April 1, 2020

More Information

Terms related to this study

Keywords

Other Study ID Numbers

  • NOR-204
  • U1111-1162-4913 (Registry Identifier: WHO)

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

YES

IPD Plan Description

Takeda makes patient-level, de-identified data sets and associated documents available for all interventional studies after applicable marketing approvals and commercial availability have been received (or program is completely terminated), an opportunity for the primary publication of the research and final report development has been allowed, and other criteria have been met as set forth in Takeda's Data Sharing Policy (see www.TakedaClinicalTrials.com for details). To obtain access, researchers must submit a legitimate academic research proposal for adjudication by an independent review panel, who will review the scientific merit of the research and the requestor's qualifications and conflict of interest that can result in potential bias. Once approved, qualified researchers who sign a data sharing agreement are provided access to these data in a secure research environment.

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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