[1] Natl Ctr Oncol Hadrontherapy CNAO, Radiat Oncol Unit, Clin Dept, Pavia, Italy
[2] Federico II Sch Med, Dept Adv Biomed Sci, Naples, Italy
[3] Natl Ctr Oncol Hadrontherapy CNAO, Clin Dept, Pavia, Italy
[4] Univ Pavia, Dept Clin Surg Diagnost & Pediat Sci, Pavia, Italy
[5] Natl Ctr Oncol Hadrontherapy CNAO, Med Phys Unit, Clin Dept, Pavia, Italy