- Correspondence to Professor Raf Bisschops, Division of Gastroenterology, University Hospitals Leuven, KU Leuven, 49 Herestraat, 3000-Leuven, Belgium;
- Received October 12, 2016
- Revised April 17, 2017
- Accepted May 21, 2017
- First published July 11, 2017.
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