1. University of Torino; Department of Surgical Sciences; Corso Achille Mario Dogliotti 14 Turin Italy 10126
2. University of Perugia; Department of Surgical and Biomedical Sciences; Sant’Andrea delle Fratte Perugia Italy 06100
3. University of Perugia; Department of General Surgery; Terni Italy 05100
4. Mercer University; Georgia Baptist College of Nursing; 3001 Mercer University Dr. Atlanta GA USA 30341
5. Città della Salute e della Scienza; Unit of Cancer Epidemiology; Torino Italy
6. Erasmus Medical Center; Department of Surgery; PO Box 2040 Rotterdam Netherlands 3000 CA
7. University of Turin; Digestive and Colorectal Surgery, Centre for Minimally Invasive Surgery; Corso Achille Mario Dogliotti 14 Turin Italy 10126