Bibliography
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"Which resources should be used to identify RCT/CCTs for systematic reviews: a systematic review." BMC Med Res Methodol. 2005;5:24. Abstract
"Development of the Cochrane Collaboration's CENTRAL Register of controlled clinical trials." Eval Health Prof. 2002;25(1):38-64. Abstract
"Reference bias in reports of drug trials." Br Med J (Clin Res Ed). 1987;295(6599):654-6. Abstract
