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Identifying strategies to maximise recruitment and retention of practices and patients in a multicentre randomised controlled trial of an intervention to optimise secondary prevention for coronary heart disease in primary care

Claire S Leathem, Margaret E Cupples, Mary C Byrne*, Mary O'Malley, Ailish Houlihan, Andrew W Murphy and Susan M Smith

BMC Medical Research Methodology 2009, 9:40  doi:10.1186/1471-2288-9-40