The WHO issues a UTN to each clinical trial upon request.
A UTN is a unique number that is generated by the WHO for every clinical trial that is registered in one of the WHO primary registries. It is intended to facilitate the identification of studies and is displayed on the WHO International Clinical Trials Registry Platform (ICTRP) search portal. As soon as the first version of the study protocol has been created, a UTN can be applied for free and easily via the WHO platform. UTN is included as a secondary ID in DRKS.