- Correspondence to Dr Michael F Byrne, Division of Gastroenterology, Vancouver General Hospital, University of British Columbia, Vancouver, BC V5Z 1M9, Canada;
- Received 23 May 2017
- Revised 20 September 2017
- Accepted 11 October 2017
- Published in print 9 November 2017.
- Published first 24 October 2017.
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