[1] Univ Perugia, Radiat Oncol Dept, Perugia, Italy
[2] Santa Maria Misericordia Hosp, Radiat Oncol Ctr, Perugia, Italy
[3] Univ Perugia, Internal Med Endocrin & Metab Sci Sect, Perugia, Italy
[4] St Maria Misericordia Hosp, Diagnost Imaging Div, Perugia, Italy
[5] St Maria Misericordia Hosp, Gastroenterol & Digest Endoscopy Div, Perugia, Italy
[6] St Maria Misericordia Hosp, Surg Div, Perugia, Italy
[7] St Maria Misericordia Hosp, Surg & Emergency Sect, Perugia, Italy