1. Division of Gastroenterology, Mayo Clinic, Jacksonville, FL, USA
2. Sanofi, Frankfurt, Germany
3. Freelance Medical Advisor, Linnich, Germany
4. Régis Delfini is currently affiliated to Boehringer Ingelheim, Ingelheim, Germany
5. Industriepark Hoechst, Building K 607, 65929 Frankfurt am Main, Germany