Cochrane Database of Systematic Reviews (2013) - Comments
pubmed: 24022476  doi: 10.1002/14651858.mr000022.pub3  issn: 1469-493x  issn: 1465-1858 

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Rebecca Beynon, Mariska M.G. Leeflang, Steve McDonald, Anne Eisinga, Ruth L Mitchell, Penny Whiting, Julie M Glanville