International Clinical Trial Registry Platform (ICTRP)
International Committee of Medical Journal Editors (ICMJE)
Clinicaltrials.gov
WHO Primary Registries
Australian New Zealand Clinical Trials Registry (ANZCTR)
Chinese Clinical Trial Register (ChiCTR)
Clinical Trials Registry - India (CTRI)
German Clinical Trials Register (DRKS)
Iranian Registry of Clinical Trials (IRCT)
ISRCTN.org
Japan Primary Registries Network
The Netherlands National Trial Register (NTR)
Pan African Clinical Trial Registry (PACTR)
Sri Lanka Clinical Trials Registry (SLCTR)
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