- Correspondence to Professor Jean-Frédéric Colombel, Division of Gastroenterology, Inflammatory Bowel Disease Center, Icahn School of Medicine, Mount Sinai Hospital, 17 East 102nd Street, 5th Floor, New York, NY 10029, USA;
- Received November 11, 2015
- Revised January 14, 2016
- Accepted January 15, 2016
- First published February 18, 2016.
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- Data supplement 1 - Online supplement
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