[1] Fdn Policlin Univ A Gemelli IRCCS, Dipartimento Diagnost Immagini Radioterapia Oncol, Rome, Italy
[2] Univ Wisconsin, Sch Med & Publ Health, Dept Human Oncol, Madison, WI USA
[3] Univ Calif Los Angeles, Dept Radiol Sci, Los Angeles, CA 90024 USA
[4] Univ Cattolica Sacro Cuore, Ist Radiol, Rome, Italy
[5] Ist Sci San Raffaele, Med Phys, Milan, Italy