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Coleman JJ, Hemming K, Nightingale PG, Clark IR, Dixon-Woods M, Ferner RE, Lilford RJ.Coleman JJ, et al.J R Soc Med. 2011 May;104(5):208-18. doi: 10.1258/jrsm.2011.110061.J R Soc Med. 2011.PMID: 21558099Free PMC article.