ClinicalTrials.gov provides free access to information on clinical studies for a wide range of diseases and conditions. Studies listed in the database are conducted in 175 countries

Prefix
clinicaltrials
Links
Homepage
Contact
Missing Contact
Pattern for Local Unique Identifiers

Local identifiers in ClinicalTrials.gov should match this regular expression:
^NCT\d{8}$

Example Local Unique Identifier
NCT00222573   Resolve
Pattern for CURIES

Compact URIs (CURIEs) constructed from ClinicalTrials.gov should match this regular expression:
^clinicaltrials:NCT\d{8}$

Example CURIE
clinicaltrials:NCT00222573
Metaregistry

The metaregistry provides mappings between the Bioregistry and other registries. There are 3 mappings to external registries for clinicaltrials.

Registry Name Metaprefix External Prefix
Identifiers.org miriam clinicaltrials
Name-to-Thing n2t clinicaltrials
Prefix Commons prefixcommons CLINICALTRIALS
Providers

Providers are various services that resolve CURIEs to URLs. The example CURIE clinicaltrials:NCT00222573 is used to demonstrate the provides available for clinicaltrials. Generation of OLS and BioPortal URLs requires additional programmatic logic beyond string formatting.

Name Metaprefix URI
ClinicalTrials.gov clinicaltrials https://clinicaltrials.gov/ct2/show/NCT00222573
Bioregistry bioregistry https://bioregistry.io/clinicaltrials:NCT00222573
Identifiers.org miriam https://identifiers.org/clinicaltrials:NCT00222573
Name-to-Thing n2t https://n2t.net/clinicaltrials:NCT00222573