- Correspondence to Dr Peter J Kahrilas, Division of Gastroenterology and Hepatology, Northwestern University Feinberg School of Medicine, 676 N. Saint Clair St., Suite 1400, Chicago, IL 60611-2951, USA;
- Received March 13, 2013
- Revised June 5, 2013
- Accepted June 6, 2013
- First published July 5, 2013.
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