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Carnes D, Anwer Y, Underwood M, Harding G, Parsons S; TOIB study team.Carnes D, et al. Among authors: parsons s.BMJ. 2008 Jan 19;336(7636):142-5. doi: 10.1136/bmj.39401.699063.BE. Epub 2007 Dec 4.BMJ. 2008.PMID: 18056742Free PMC article.Clinical Trial.