[1] IRCCS Azienda Osped Univ Bologna, Radiat Oncol, Bologna, Italy
[2] Alma Mater Studiorum Bologna Univ, Dept Expt Diagnost & Specialty Med DIMES, Bologna, Italy
[3] Harvard Med Sch, Dana Farber Canc Inst, Boston, MA 02115 USA
[4] Univ Cattolica Sacro Cuore, Gemelli Molise Hosp, Radiat Oncol Unit, Campobasso, Italy
[5] Univ Cattolica Sacro Cuore, Ist Radiol, Rome, Italy
[6] Univ Cattolica Sacro Cuore, Gemelli Molise Hosp, Med Phys Unit, Campobasso, Italy
[7] San Rossore Private Hosp, Radiat Oncol, Pisa, Italy
[8] Osped Belcolle, Radiotherapy Unit, Viterbo, Italy
[9] Inst Oncol Vojvodina, Sremska Kamenica, Serbia
[10] Novi Sad Univ, Med Fac, Novi Sad, Serbia
[11] IRCCS Casa Sollievo Sofferenza, Unit Radiat Therapy, San Giovanni Rotondo, Italy
[12] Fdn Policlin Univ A Gemelli IRCCS, Dipartimento Sci Radiol Radioterap & Ematol, UOC Radioterapia, Rome, Italy
[13] Campus Biomed Univ, Radiat Oncol, Rome, Italy
[14] Azienda Osped Univ Careggi, Radiat Oncol, Florence, Italy
[15] Univ Genoa, Policlin San Martino, Dept Radiotherapy, Genoa, Italy
[16] Azienda Osped San Gerardo, Radiotherapy Unit, Monza, Italy
[17] IRCCS Candiolo, Candiolo Canc Inst FPO, Radiat Therapy, Candiolo, Italy
[18] IRCCS Azienda Osped Univ Bologna, Med Oncol, Bologna, Italy
[19] Azienda Osped Univ Integrata, Dept Radiotherapy, Verona, Italy