1. Department of Internal Medicine; Park-Klinik Weissensee; Berlin; Germany
2. Division of Gastroenterology; University Hospital Leuven; TARGID (Translational Research Center for Gastrointestinal Disorders); University of Leuven; Leuven; Belgium
3. Across Health; Ghent; Belgium
4. Shire-Movetis NV; Turnhout; Belgium