- Correspondence to Dr Nigel J Trudgill, Department of Gastroenterology, Sandwell General Hospital, Lyndon, West Bromwich, B71 4HJ, UK;
- Received 30 March 2017
- Revised 26 May 2017
- Accepted 3 July 2017
- Published in print 4 August 2017.
- Published online 5 August 2017.
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