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Ward JK, McEachan RR, Lawton R, Armitage G, Watt I, Wright J; Yorkshire Quality and Safety Research Group.Ward JK, et al. Among authors: mceachan rr.BMC Health Serv Res. 2011 May 27;11:130. doi: 10.1186/1472-6963-11-130.BMC Health Serv Res. 2011.PMID: 21619575Free PMC article.