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Tweetations for "Impact and Costs of Incentives to Reduce Attrition in Online Trials: Two Randomized Controlled Trials"

Zarnie Khadjesari, Elizabeth Murray, Eleftheria Kalaitzaki, Ian R. White, Jim McCambridge, Simon G. Thompson, Paul Wallace, Christine Godfrey
J Med Internet Res 2011 (Mar 02); 13(1):e26 

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