Recruitment issues when primary care population clusters are used in randomised controlled clinical trials: Climbing mountains or pushing boulders uphill? 期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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Recruitment issues when primary care population clusters are used in randomised controlled clinical trials: Climbing mountains or pushing boulders uphill?

作者姓名：	Hoddinott P Britten J Harrild K Godden DJ

摘要：
收稿时间：	17 January 2006
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