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The ChiCTR is a primary registry of the World Health Organization's International Clinical Trial Registry.
For ongoing trials, we collected data from the trial records available in the WHO-ICTRP and in the primary registry's records.
Primary Registry and Trial Identifying Number 2. Date of Registration in Primary Registry 3. Secondary Identifying Numbers 4. Source(s) of Monetary or Material Support 5.
The search portal provides a textual description of the trial design as well as a link to the primary registry.
This study is registered at the Iranian Registry of Clinical Trials (www.irct.ir) which is a Primary Registry in the WHO Registry Network.
Although the Brazilian registry is also a primary registry, it is surprising that Brazil does not appear among the top four active countries for research.
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We searched 11 WHO primary registries for Chinese trials records.
As of July 2009 ,10WHO primary registries in Australia and New Zealand, the United Kingdom, China, India, Germany, Japan, the Netherlands, Iran, Sri Lanka, and Africa are approved by WHO ICTRP.
We assessed the quality of methodological information available for ongoing RCTs registered in six WHO Primary Registries and ClinicalTrials.gov in 2008.
Clinicaltrials.gov contained a significantly higher proportion of industry funded RCTs compared to the WHO Primary Registries (43% vs. 20%; p<0.001).
ICMJE accepts registration of trials in any of the WHO ICTRP primary registries, and WHO ICTRP accepts registrations approved by ICMJE [11] [14].
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