1. University of Perugia; Department of General Surgery; Terni Italy 05100
2. Sapienza University of Rome; Department of Surgical Sciences; Viale Regina Elena, 324 Rome Italy 00161
3. University of Torino; Department of Surgical Sciences; Corso Achille Mario Dogliotti 14 Turin Italy 10126
4. Regional Health Authority of Umbria; Health Planning Service; Via Mario Angeloni 61 Perugia PG Italy 06124
5. University of Torino; Division of Nuclear Medicine; Corso AM Dogliotti 14 Turin Torino Italy 10126
6. University of Perugia; Department of Endocrine Surgery; Terni Terni Italy
7. Mercer University; Tift College of Education; 3001 Mercer University Dr. Atlanta GA USA 30341
8. Jagiellonian University, Medical College; Department of Endocrine Surgery, Third Chair of General Surgery; 37 Pradnicka Street Krakow Poland 31-202