1. Department of General Surgery and Surgical Specialties “Paride Stefanini” and Sapienza University of Rome, Rome, Italy.
2. Department of Internal Medicine and Medical Specialties, Sapienza University of Rome, Rome, Italy.
3. Section for Surgical Research, Department of Surgery, Medical University of Graz, Graz, Austria.
4. Department of Gastrointestinal Surgery, Ruijin Hospital and Jiao Tong University School of Medicine, Shangai, China.