BMC Medical Research Methodology

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Participant characteristics associated with withdrawal from a large randomized trial of spermicide effectiveness

Elizabeth G Raymond*, Pai L Chen, Bosny Pierre-Louis, Joanne Luoto, Kurt T Barnhart, Lynn Bradley, Mitchell D Creinin, Alfred Poindexter, Livia Wan, Mark Martens, Robert Schenken, Cate F Nicholas and Richard Blackwell

BMC Medical Research Methodology 2004, 4:23 doi:10.1186/1471-2288-4-23

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