1. Ellen Leifer Shulman and Steven Shulman Digestive Disease Center Cleveland Clinic Florida Weston Florida USA
2. Bart's and the London School of Medicine and Dentistry London UK
3. Colorectal Surgery Unit, General Surgery Department Mansoura University Hospitals Mansoura Egypt
4. Department of General Surgery, Faculty of Medicine, Hadassah Medical Organization Hebrew University of Jerusalem Jerusalem Israel
5. Department of Surgery and Transplantations Sheba Medical Center Ramat Gan Israel
6. Department of General Surgery, Shaare Zedek Medical Center, Faculty of Medicine Hebrew University of Jerusalem Jerusalem Israel