- Correspondence to Professor Massimo Colombo, 1st Division of Gastroenterology, Fondazione IRCCS Cà Granda Ospedale Maggiore Policlinico, Via F. Sforza 35, Milan 20122, Italy;
- Received July 15, 2013
- Revised October 3, 2013
- Accepted October 15, 2013
- First published November 7, 2013.
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