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- Dr E Morris, Centre for Epidemiology & Biostatistics & NYCRIS, University of Leeds, Level 6 Bexley Wing, St James's University Hospital, Leeds LS9 7TF, UK; eva.morris{at}nycris.leedsth.nhs.uk
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April 18, 2016
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2008 BMJ Publishing Group & British Society of Gastroenterology