- Correspondence to Dr Hey-Long Ching, Clinical Research Fellow, Gastroenterology, Royal Hallamshire Hospital,Sheffield Teaching Hospitals, Sheffield, S10 2JF, UK;
- Received 22 March 2017
- Revised 29 May 2017
- Accepted 3 July 2017
- Published in print 4 August 2017.
- Published online 5 August 2017.
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