1. FMUSP and Nucleus of General and Specialized Surgery; Sao Paulo Brazil
2. Department of Medicine; Mayo Clinic Florida; Jacksonville Florida
3. Università degli Studi di Milano and Fondazione IRCCS Cà Granda - Ospedale Maggiore Policlinico; Milan Italy
4. The Oregon Clinic GI/MIS; Portland Oregon
5. Department of Surgery; University of Washington; Seattle Washington
6. Department of Gastroenterology; Walter Reed National Military Medical Center; Bethesda Maryland