1. Nucleus of General and Specialized Surgery – São Paulo and Department of Gastroenterology – Surgical Division – São Paulo University FMUSP Sao Paulo Brazil
2. Department of Surgery John A. Burns School of Medicine, the University of Hawaii at Manoa Honolulu Hawaii
3. Division of General and Foregut Surgery, Department of Biomedical Sciences for Health, IRCCS Policlinico San Donato The University of Milan San Donato Milanese Italy
4. Department of Internal Medicine Kosin University College of Medicine Busan Korea