- Correspondence to Professor Ali Canbay, Department of Gastroenterology and Hepatology, University Hospital, University Duisburg-Essen, Hufelandstr. 55, Essen 45122, Germany;
- Received May 6, 2015
- Revised May 14, 2015
- Accepted May 15, 2015
- First published June 3, 2015.
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