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Oliver D, Connelly JB, Victor CR, Shaw FE, Whitehead A, Genc Y, Vanoli A, Martin FC, Gosney MA.Oliver D, et al. Among authors: connelly jb.BMJ. 2007 Jan 13;334(7584):82. doi: 10.1136/bmj.39049.706493.55. Epub 2006 Dec 8.BMJ. 2007.PMID: 17158580Free PMC article.Review.