DOES IT WORK? -a randomized controlled trial to test the efficacy of HCV and HIV-related education on drug users in MMT, China.

Protocols for this study were approved by institution review board (IRB) of Shanghai Mental Health Center (IRB:2009036), and registered in U.S national institutes of health (http://www.clinicaltrials.gov, NCT01647191 ). Registered 23 July 2012.