Impact and Costs of Incentives to Reduce Attrition in Online Trials: Two Randomized Controlled Trials
Zarnie Khadjesari(King's College London), Christine Godfrey(University of York), Ian R. White(MRC Clinical Trials Unit at UCL), Elizabeth Murray(University College London), Jim McCambridge(University College Dublin), Paul Wallace(Harvard University), Simon G. Thompson(MRC Biostatistics Unit), Eleftheria Kalaitzaki(University College London)
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