- Correspondence to Dr Kai-Henrik Peiffer, Department of Gastroenterology and Hepatology, J. W. Goethe-University Hospital, Haus 11, Theodor-Stern-Kai 7, Frankfurt am Main 60590, Germany;
- Received April 7, 2013
- Revised June 26, 2013
- Accepted June 27, 2013
- First published July 18, 2013.
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