Brain CancerPhase 3CheckMate 498NCT02617589
An Investigational Immuno-therapy Study of Nivolumab Compared to Temozolomide, Each Given With Radiation Therapy, for Newly-diagnosed Patients With Glioblastoma (GBM, a Malignant Brain Cancer)
A Phase 3 study testing Nivolumab, Temozolomide and Radiotherapy in people with Brain Cancer, run by Bristol-Myers Squibb at 125 sites in 19 countries.
Trial summary
The purpose of this study is to evaluate patients with glioblastoma that is MGMT-unmethylated (the MGMT gene is not altered by a chemical change). Patients will receive Nivolumab every two weeks in addition to radiation therapy, and then every four weeks. Read more about this study
- Who is it for?
- Ages 18 years and older
- Conditions the study is for
- Brain Cancer
- What is being tested?
- Nivolumab, Temozolomide and Radiotherapy
- Type of treatment
- Injection or infusion, Surgery or procedure
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 560 participants
- Where
- 125 sitesin 19 countries
- Study dates
- 1 Mar 2016to 4 Mar 2022
- Phase
- Phase 3
- Are there results?
- Yes, posted in the registrySummary in the doctors' view
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 years and older
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- Males and Females, age ≥ 18 years old
- Newly-diagnosed brain cancer or tumor called glioblastoma or GBM
- Tumor test result shows MGMT unmethylated type
- Karnofsky performance status of ≥ 70 (able to care for self)
Who cannot join
- Prior treatment for GBM (other than surgical resection)
- Any known tumor outside of the brain
- Recurrent or secondary GBM
- Active known or suspected autoimmune disease
- Biopsy with less than 20% of tumor removed
- Other protocol-defined inclusion/exclusion criteria apply
Trial locations and contacts
125 sites in 19 countries.
125 sites in 19 countries
United States37 sites
Local Institution - 0132
Allentown, Pennsylvania, 18103
Emory University - Winship Cancer Institute
Atlanta, Georgia, 30322
Johns Hopkins University School Of Medicine
Baltimore, Maryland, 21287
University of Alabama at Birmingham
Birmingham, Alabama, 35294-3410
Dana-Farber Cancer Institute
Boston, Massachusetts, 02215
Massachusetts General Hospital
Boston, Massachusetts, 02215
Medical University Of South Carolina
Charleston, South Carolina, 29425
Levine Cancer Institute
Charlotte, North Carolina, 28204
Local Institution - 0090
Chattanooga, Tennessee, 37404
The University Of Chicago
Chicago, Illinois, 60637
Local Institution - 0010
Cleveland, Ohio, 44195
Local Institution - 0095
Columbus, Ohio, 43210
University Of Texas Southwestern Medical Center
Dallas, Texas, 75390-8852
Local Institution - 0006
Detroit, Michigan, 48202
Preston Robert Tisch Brain Tumor Center at Duke University
Durham, North Carolina, 27710
JFK Medical Center
Edison, New Jersey, 08820
Local Institution - 0064
Hackensack, New Jersey, 07601
University Of Texas Md Anderson Cancer Ctr
Houston, Texas, 77030
Cedars Sinai Medical Center
Los Angeles, California, 90048
Local Institution - 0019
Los Angeles, California, 90095-1769
Norton Cancer Institute
Louisville, Kentucky, 40202
University Of Miami Sylvester Comprehensive Cancer Center
Miami, Florida, 33136
Vanderbilt University Medical Center
Nashville, Tennessee, 37232
Yale Cancer Center
New Haven, Connecticut, 06520
Columbia University Medical Center (Cumc)
New York, New York, 10032
Memorial Sloan Kettering Cancer Center
New York, New York, 10065
Local Institution - 0007
Philadelphia, Pennsylvania, 19107
Local Institution - 0083
Phoenix, Arizona, 85013
Sutter Institute For Medical Research
Sacramento, California, 95816
Local Institution - 0068
Salt Lake City, Utah, 84112
Sharp Memorial Hospital
San Diego, California, 92123
The Regents of the University of California, San Francisco
San Francisco, California, 94143-0372
Swedish Neuroscience Institute
Seattle, Washington, 98122
Washington University School OF Medicine-Siteman Cancer Center
St Louis, Missouri, 63110
Moffitt Cancer Center
Tampa, Florida, 33612
Georgetown University Medical Center
Washington D.C., District of Columbia, 20007
University Of Kansas Medical Center
Westwood, Kansas, 66205
Japan21 sites
Local Institution - 0128
Bunkyo-ku, Tokyo, 1138655
Local Institution - 0125
Chiba, Chiba, 2608677
Local Institution - 0114
Chuo-ku, Tokyo, 1040045
Local Institution - 0113
Hidaka, Saitama, 350-1298
Local Institution
Hirakata-shi, Osaka, 5731191
Local Institution - 0123
Hiroshima, Hiroshima, 7348551
Local Institution - 0131
Kagoshima, Kagoshima-ken, 8908520
Local Institution - 0121
Kanazawa, Ishikawa-ken, 9200934
Local Institution - 0129
Kobe, Hyōgo, 6500017
Local Institution - 0119
Kumamoto, Kumamoto, 8608556
Local Institution - 0117
Kyoto, Kyoto, 606-8507
Local Institution - 0116
Kyoto, Kyoto, 6128555
Local Institution - 0118
Mitaka-shi, Tokyo, 181-8611
Local Institution - 0115
Nagoya, Aichi-ken, 4668560
Local Institution - 0134
Okayama, Okayama-ken, 7008558
Local Institution - 0133
Sagamihara-shi, Kanagawa, 2520375
Local Institution - 0122
Sapporo, Hokkaido, 0608648
Local Institution - 0130
Suita-shi, Osaka, 565-0871
Local Institution - 0112
Tokyo, 1628666
Local Institution - 0111
Tsukuba, Ibaraki, 3058576
Local Institution - 0110
Yamagata, Yamagata, 9909585
Germany11 sites
Local Institution - 0051
Bonn, 53105
Local Institution - 0139
Cologne, 50937
Local Institution - 0072
Erlangen, 91054
Local Institution - 0049
Frankfurt am Main, 60528
Local Institution - 0073
Freiburg im Breisgau, 79106
Local Institution - 0054
Hamburg, 20246
Local Institution - 0052
Heidelberg, 69120
Local Institution - 0138
Munich, 81675
Local Institution - 0050
Münster, 48149
Local Institution - 0055
Regensburg, 93053
Local Institution - 0056
Tübingen, 72076
France8 sites
Local Institution - 0032
Bron, 69677
Local Institution
Lille, 59037
Local Institution - 0024
Marseille, 13005
Local Institution - 0101
Nancy, 54035
Local Institution - 0023
Paris, 75010
Local Institution - 0038
Paris, 75651
Centre Eugene Marquis
Rennes, 35000
Local Institution - 0106
Toulouse, 31100
Spain7 sites
Local Institution
Badalona-Barcelona, 08916
Local Institution
Barcelona, 08035
Local Institution - 0028
Barcelona, 08036
Local Institution - 0029
Madrid, 28007
Local Institution
Madrid, 28041
Local Institution
Santiago de Compostela, 15706
Local Institution - 0025
Valencia, 46014
Italy6 sites
Local Institution - 0076
Bologna, 40139
Local Institution - 0079
Milan, 20133
Local Institution - 0126
Padova, 35128
Local Institution - 0135
Rozzano (milano), 20089
Local Institution - 0078
Siena, 53100
Local Institution - 0077
Torino, 10126
Australia5 sites
Local Institution - 0003
Heidelberg, Victoria, 3084
Local Institution - 0001
Nedlands, Western Australia, 6009
Local Institution - 0002
New South Wales, 2170
Local Institution - 0004
Prahran, Victoria, 3181
Royal North Shore Hospital
St Leonards, New South Wales, 2065
Netherlands4 sites
NKI AVL
Amsterdam, 1066 CX
Universitair Medisch Centrum Groningen
Groningen, 9713 AP
Erasmus Mc
Rotterdam, 3015 CE
Local Institution - 0063
Utrecht, 3584CX
United Kingdom4 sites
Beaston West of Scotland Cancer Centre
Glasgow, G12 0YN
University College Hospital
London, Greater London, NW1 2PG
Christie Hospital Nhs Found. Trust
Manchester, Greater Manchester, M20 4BX
Royal Marsden Hospital
Sutton, Surrey, SM2 5PT
Belgium3 sites
Universitair Ziekenhuis Brussel
Brussels, 1090
Cliniques Universitaires Saint-Luc
Brussels, 1200
Uz Leuven
Leuven, 3000
Canada3 sites
Montreal Neurological Institute and Hospital
Montreal, Quebec, H3A 2B4
Princess Margaret Cancer Centre
Toronto, Ontario, M5G 2M9
BC Cancer - Vancouver
Vancouver, British Columbia, V5Z 4E6
Switzerland3 sites
Local Institution - 0059
Geneva, 1211
Local Institution - 0057
Lausanne, 1011
Local Institution - 0053
Zurich, 8091
Austria2 sites
Local Institution - 0061
Linz, 4020
Local Institution - 0060
Vienna, 1090
Denmark2 sites
Local Institution
Copenhagen, 2100
Local Institution
Odense, 5000
Israel2 sites
Local Institution - 0096
Petah Tikva, 49100
Local Institution - 0097
Tel Aviv, 64239
Poland2 sites
Local Institution - 0080
Gdansk, 80952
Local Institution - 0081
Warsaw, 02-781
Russia2 sites
Local Institution - 0070
Moscow, 105229
Local Institution - 0105
Moscow, 115478
About this study
Official title: A Randomized Phase 3 Open Label Study of Nivolumab vs Temozolomide Each in Combination With Radiation Therapy in Newly Diagnosed Adult Subjects With Unmethylated MGMT (Tumor O-6-methylguanine DNA Methyltransferase) Glioblastoma (CheckMate 498: CHECKpoint Pathway and Nivolumab Clinical Trial Evaluation 498)
The purpose of this study is to evaluate patients with glioblastoma that is MGMT-unmethylated (the MGMT gene is not altered by a chemical change). Patients will receive Nivolumab every two weeks in addition to radiation therapy, and then every four weeks. They will be compared to patients receiving standard therapy with temozolomide in addition to radiation therapy.
- Conditions
- Brain Cancer
- Being tested
- Nivolumab, Temozolomide, Radiotherapy
- Medical subject headings
- Brain Neoplasms
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
NivolumabDrug
TemozolomideDrug
RadiotherapyRadiation
| Study group | Role | What they receive |
|---|---|---|
| Nivolumab + Radiotherapy Arm | Experimental | Nivolumab IV infusion + Radiotherapy dose as specified Receives: Drug: Nivolumab; Radiation: Radiotherapy |
| Temozolomide + Radiotherapy Arm | Active comparator | Temozolomide + Radiotherapy dose as specified Receives: Drug: Temozolomide; Radiation: Radiotherapy |
What is being measured
The primary outcome is the main question the study is designed to answer.
Overall Survival (OS)
OS is defined as the time between the date of randomization and the date of death due to any cause. A participant who has not died will be censored at the last known alive date.
Measured: up to 3 years
Secondary outcomes (4)
Kaplan-Meier Plot of Progression Free Survival
PFS was defined as the time from randomization to the date of the first documented tumor progression or death due to any cause. Participants who did not have disease progression or who did not die were censored at the date of last tumor assessment. Participants who did not have any on study tumor assessment and did not have tumor progression or die were censored at the randomization date. Participants who started any subsequent anti-cancer therapy without a prior reported progression were censored at the last tumor assessment prior to initiation of the subsequent anti-cancer therapy. Participants who had surgical resection post start of study treatment were censored at the last tumor assessment date prior to initiation of surgical resection. PFS was determined by investigator reported response based on the Radiologic Assessment in Neuro-Oncology criteria.
Measured: From randomization to the date of the first documented tumor progression or death due to any cause (up to approximately 6 years)
Overall Survival Rate at 24 Months
The overall survival (OS) rate of (nivolumab + radiation therapy) and (temozolomide + radiation therapy) estimated as Kaplan-Meier probability of survival at 24 months. OS was defined as the time between the date of randomization and the date of death due to any cause. A participant who has not died was censored at the last known alive date.
Measured: At 24 Months
Overall Survival in Tumor Mutational Burden (TMB) High Population
OS in all randomized participants that are tumor mutational burden high. OS was defined as the time between the date of randomization and the date of death due to any cause. A participant who has not died was censored at the last known alive date.
Measured: From randomization to the date of death due to any cause (up to approximately 6 years)
Progression Free Survival in Tumor Mutational Burden (TMB) High Population
PFS in all randomized participants that are tumor mutational burden high. PFS was defined as the time from randomization to the date of the first documented tumor progression or death due to any cause. Participants who did not have disease progression or who did not die were censored at the date of last tumor assessment. Participants who did not have any on study tumor assessment and did not have tumor progression or die were censored at the randomization date. Participants who started any subsequent anti-cancer therapy without a prior reported progression were censored at the last tumor assessment prior to initiation of the subsequent anti-cancer therapy. Participants who had surgical resection post start of study treatment were censored at the last tumor assessment date prior to initiation of surgical resection. PFS was determined by investigator reported response based on the Radiologic Assessment in Neuro-Oncology criteria.
Measured: From randomization to the date of the first documented tumor progression or death due to any cause (up to approximately 6 years)
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted1 Dec 2015 (estimated)
- Study start1 Mar 2016
- Primary completion17 Jan 2019
- Study completion4 Mar 2022
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Posted resultsParticipant flow, outcome measures and adverse events reported by the sponsor.
- Publications (3)Papers the sponsor has linked to this study.
- Other trials for Brain CancerStudies of the same condition, open and under way.
- More trials run by Bristol-Myers SquibbThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase 3
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Enrolment
- 560 participants (actual)
Sponsor and investigators
- Lead sponsor
- Bristol-Myers Squibb
- Sponsor type
- Industry (pharma, biotech, devices)
- Collaborators
- Ono Pharmaceutical Co., Ltd.
- Responsible party
- Sponsor
- Investigators
- Bristol-Myers Squibb, Study director, Bristol-Myers Squibb
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT02617589
- Sponsor's protocol ID
- CA209-498
- Other IDs
- 2015-003739-37, 2015
- Acronym
- CheckMate 498
- Status last verified
- Mar 2023
- First submitted
- 26 Nov 2015
- Last updated
- 28 Mar 2023
- Results posted
- Yes, on ClinicalTrials.gov
- Data monitoring committee
- Yes
- FDA-regulated drug
- Yes
- FDA-regulated device
- No
- Expanded access
- Available
Publications
Grkovski M, Daras M, Bale T, Lyashchenko S, Reiner AS, Mellinghoff IK, Schoder H, Dunphy MPS. 18F-BMS-986229 PET imaging of tumor PD-L1 expression in glioblastoma patients. EJNMMI Res. 2025 Sep 26;15(1):124. doi: 10.1186/s13550-025-01283-x.
PubMed 41003913Omuro A, Brandes AA, Carpentier AF, Idbaih A, Reardon DA, Cloughesy T, Sumrall A, Baehring J, van den Bent M, Bahr O, Lombardi G, Mulholland P, Tabatabai G, Lassen U, Sepulveda JM, Khasraw M, Vauleon E, Muragaki Y, Di Giacomo AM, Butowski N, Roth P, Qian X, Fu AZ, Liu Y, Potter V, Chalamandaris AG, Tatsuoka K, Lim M, Weller M. Radiotherapy combined with nivolumab or temozolomide for newly diagnosed glioblastoma with unmethylated MGMT promoter: An international randomized phase III trial. Neuro Oncol. 2023 Jan 5;25(1):123-134. doi: 10.1093/neuonc/noac099.
PubMed 35419607Woroniecka K, Fecci PE. Immuno-synergy? Neoantigen vaccines and checkpoint blockade in glioblastoma. Neuro Oncol. 2020 Sep 29;22(9):1233-1234. doi: 10.1093/neuonc/noaa170. No abstract available.
PubMed 32691060
Study at a glance
From the registry record, last updated by the sponsor on 28 Mar 2023. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- A Randomized Phase 3 Open Label Study of Nivolumab vs Temozolomide Each in Combination With Radiation Therapy in Newly Diagnosed Adult Subjects With Unmethylated MGMT (Tumor O-6-methylguanine DNA Methyltransferase) Glioblastoma (CheckMate 498: CHECKpoint Pathway and Nivolumab Clinical Trial Evaluation 498)
- ClinicalTrials.gov ID
- NCT02617589
- Acronym / sponsor ID
- CheckMate 498 / CA209-498
- Conditions
- Brain Cancer
- Phase
- Phase 3
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 560 participants (actual)
- Lead sponsor
- Bristol-Myers SquibbIndustry (pharma, biotech, devices)
- Collaborators
- Ono Pharmaceutical Co., Ltd.
- Study start
- 1 Mar 2016 (actual)
- Primary completion
- 17 Jan 2019 (actual)
- Study completion
- 4 Mar 2022 (actual)
- First posted
- 1 Dec 2015 (estimated)
- Results
- Posted 3 Feb 2021
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
The purpose of this study is to evaluate patients with glioblastoma that is MGMT-unmethylated (the MGMT gene is not altered by a chemical change). Patients will receive Nivolumab every two weeks in addition to radiation therapy, and then every four weeks. They will be compared to patients receiving standard therapy with temozolomide in addition to radiation therapy.
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Nivolumab + Radiotherapy Arm | Experimental | Drug: Nivolumab, Radiation: RadiotherapyNivolumab IV infusion + Radiotherapy dose as specified |
| Temozolomide + Radiotherapy Arm | Active comparator | Drug: Temozolomide, Radiation: RadiotherapyTemozolomide + Radiotherapy dose as specified |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (4 listed)
- Males and Females, age ≥ 18 years old
- Newly-diagnosed brain cancer or tumor called glioblastoma or GBM
- Tumor test result shows MGMT unmethylated type
- Karnofsky performance status of ≥ 70 (able to care for self)
Key exclusion criteria (6 listed)
- Prior treatment for GBM (other than surgical resection)
- Any known tumor outside of the brain
- Recurrent or secondary GBM
- Active known or suspected autoimmune disease
- Biopsy with less than 20% of tumor removed
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Nivolumab | Drug | Nivolumab + Radiotherapy Arm |
| Temozolomide | Drug | Temozolomide + Radiotherapy Arm |
| Radiotherapy | Radiation | Nivolumab + Radiotherapy Arm, Temozolomide + Radiotherapy Arm |
Primary outcome
Overall Survival (OS)
Time frame: up to 3 years
OS is defined as the time between the date of randomization and the date of death due to any cause. A participant who has not died will be censored at the last known alive date.
4 secondary outcomes
Kaplan-Meier Plot of Progression Free Survival
Time frame: From randomization to the date of the first documented tumor progression or death due to any cause (up to approximately 6 years)
Overall Survival Rate at 24 Months
Time frame: At 24 Months
Overall Survival in Tumor Mutational Burden (TMB) High Population
Time frame: From randomization to the date of death due to any cause (up to approximately 6 years)
Progression Free Survival in Tumor Mutational Burden (TMB) High Population
Time frame: From randomization to the date of the first documented tumor progression or death due to any cause (up to approximately 6 years)
Results and safety
Loading the posted results from ClinicalTrials.gov…
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 28 Mar 2023.
- Posted resultsParticipant flow, baseline, all outcome measures and adverse events.
- Derived from this study: PubMed 41003913Grkovski M, Daras M, Bale T, Lyashchenko S, Reiner AS, Mellinghoff IK, Schoder H, Dunphy MPS. 18F-BMS-986229 PET imaging of tumor PD-L1 expression in glioblastoma patients. EJNMMI Res. 2025 Sep 26;15(1):124. doi: 10.1186/s13550-025-01283-x.
- Derived from this study: PubMed 35419607Omuro A, Brandes AA, Carpentier AF, Idbaih A, Reardon DA, Cloughesy T, Sumrall A, Baehring J, van den Bent M, Bahr O, Lombardi G, Mulholland P, Tabatabai G, Lassen U, Sepulveda JM, Khasraw M, Vauleon E, Muragaki Y, Di Giacomo AM, Butowski N, Roth P, Qian X, Fu AZ, Liu Y, Potter V, Chalamandaris AG, Tatsuoka K, Lim M, Weller M. Radiotherapy combined with nivolumab or temozolomide for newly diagnosed glioblastoma with unmethylated MGMT promoter: An international randomized phase III trial. Neuro Oncol. 2023 Jan 5;25(1):123-134. doi: 10.1093/neuonc/noac099.
- Derived from this study: PubMed 32691060Woroniecka K, Fecci PE. Immuno-synergy? Neoantigen vaccines and checkpoint blockade in glioblastoma. Neuro Oncol. 2020 Sep 29;22(9):1233-1234. doi: 10.1093/neuonc/noaa170. No abstract available.
- BMS Clinical Trial InformationLink provided by the sponsor.
- BMS Clinical Trial Patient RecruitingLink provided by the sponsor.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Bristol-Myers Squibb study director
Bristol-Myers Squibb
125 sites in 19 countries: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 3 study testing Nivolumab, Temozolomide and Radiotherapy in people with Brain Cancer, run by Bristol-Myers Squibb at 125 sites in 19 countries.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 4 inclusion and 6 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 28 Mar 2023. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 125 sites in United States, Japan, Germany, France, Spain and 14 more countries. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
What does this phase mean?
Phase 3 studies compare the treatment with the current standard treatment or a placebo in a large group, to confirm how well it works and watch for side effects.
Not every study follows the same path, and some studies (observational studies, device studies) have no phase.
Are results available for this study?
Yes. Results are posted in the registry (first posted 3 Feb 2021). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Overall Survival (OS) (time frame: up to 3 years). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT02617589, which also lists 3 linked publications.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 28 Mar 2023.