- Correspondence to Dr A C Ford, Leeds Gastroenterology Institute, Room 125, 4th Floor, Bexley Wing, St James's University Hospital, Beckett Street, Leeds LS9 7TF, UK;
- Received November 30, 2013
- Revised January 6, 2014
- Accepted January 7, 2014
- First published January 21, 2014.
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