WHO ICTRP Registry Criteria
Primary Registries in the WHO Registry Network will:
- Have in place processes to prevent the registration of a single trial more than once on their database
- Facilitate the retrospective linking (or bridging) on the WHO Search Portal of a single trial registered with more than one registry by entering secondary identifiers. This includes the UTN, and the unique identifiers allocated by other Primary Registries in the WHO Registry Network
It is desirable that Primary Registries in the WHO Registry Network as part of the registration process, search the ICTRP Search Portal and attempt to determine if the trial has already been registered by another Primary Registry or an ICMJE approved registry.