- Correspondence to Dr Chaysavanh Manichanh, Department of Gastroenterology, Vall d'Hebron Research Institute, Pg Vall d'Hebron, Barcelona 119-129, Spain;
- Received October 14, 2016
- Revised December 22, 2016
- Accepted December 28, 2016
- First published February 7, 2017.
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