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Cresswell KM, Sadler S, Rodgers S, Avery A, Cantrill J, Murray SA, Sheikh A; PINCER Evaluation Team.Cresswell KM, et al.Trials. 2012 Jun 8;13:78. doi: 10.1186/1745-6215-13-78.Trials. 2012.PMID: 22682095Free PMC article.Clinical Trial.