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Grey Literature
Grey literature sources for research
Trial registries
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Australian New Zealand Clinical Trials Registry (ANZCTR)The ANZCTR is an online registry of clinical trials being
undertaken in Australia, New Zealand and elsewhere. -
Clinical Trials.gov (United States)ClinicalTrials.gov is a database of privately and publicly funded clinical studies conducted around the world.
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Cochrane Central Register of Controlled TrialsA bibliographic database that provides a highly concentrated source of reports of randomized controlled trials. Records contain the list of authors, the title of the article, the source, volume, issue, page numbers, and, in many cases, a summary of the article (abstract). Access is not available outside Australia.
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Current Controlled TrialsAllows users to search, register and share information about randomised controlled trials.
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EU Clinical Trials Register (EU-CTR)
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National Cancer Institute Clinical Trials GroupThe NCIC Clinical Trials Group is a cooperative oncology group which carries out clinical trials in cancer therapy, supportive care and prevention across Canada and internationally.
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National Institute for Health Research Clinical Research NetworkProvides part of the infrastructure that allows high-quality clinical research to take place in the NHS
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WHO International Clinical Trials Registry PlatformThe main aim of the WHO ICTRP is to facilitate the prospective registration of the WHO Trial Registration Data Set on all clinical trials, and the public accessibility of that information.
Unregistered clinical trials
Unregistered clinical trials can sometimes also be found in theses and government reports