1. Translational Gastroenterology Unit; Nuffield Department of Experimental Medicine; University of Oxford; Oxford UK
2. Surgical Department; Gastroenterology Division; Hospital Beatriz Ângelo; Loures Portugal
3. Department of Gastroenterology; CHU Liège University Hospital; Liège Belgium
4. The Dr. Henry D. Janowitz Division of Gastroenterology; Icahn School of Medicine at Mount Sinai; New York City NY USA