[1] Azienda Sanit Firenze, SC Fis Sanit, Florence, Italy
[2] IFCA, Radiotherapy, Florence, Italy
[3] CDI, Radiotherapy, Milan, Italy
[4] Ist Besta, Radiotherapy, Milan, Italy
[5] CBH Citta Bari Hosp, Radiotherapy, Bari, Italy
[6] IEO, Radiotherapy, Milan, Italy
[7] Humanitas Res Hosp, Med Phys Unit, Radiat Oncol Dept, Milan, Italy