Methods to increase response to postal and electronic questionnaires.
Edwards PJ, Roberts I, Clarke MJ, Diguiseppi C, Wentz R, Kwan I, Cooper R, Felix LM, Pratap S.
Edwards PJ, et al. Among authors: wentz r.
Cochrane Database Syst Rev. 2009 Jul 8;2009(3):MR000008. doi: 10.1002/14651858.MR000008.pub4.
Cochrane Database Syst Rev. 2009.
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