- Correspondence to Professor Robin Spiller, NIHR Nottingham Digestive Diseases Biomedical Research Unit, E Floor West Block, Queen's Medical Centre, University of Nottingham, Derby Road, Nottingham, NG7 2UH, UK;
- Received 6 January 2015
- Revised 2 February 2015
- Accepted 3 February 2015
- Published in print 1 January 2016.
- Published online 8 December 2015.
- Published first 12 March 2015.
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