¹University of Mons, Laboratory of human anatomy and experimental oncology , Mons , Belgium; ²University of Mons, Laboratory of human anatomy and experimental oncology, Mons , Belgium; ³University of Mons, Laboratory of human anatomy and experimental oncology, Mons, Belgium

(1)Policlinico Universitario S. Orsola Malpighi, U.O. di Radioterapia- Dipartimento di Medicina Specialistica Diagnostica e Sperimentale-DIMES- Azienda Ospedaliera-Universitaria S.Orsola-Malpighi- Bologna, Bologna, Italy;(2)U.O.C di Radioterapia Fondazione Policlinico Universitario A. Gemelli- IRCCS, Dipartimento di Scienze Radiologiche- Radioterapiche ed Ematologiche, Roma, Italy;(3)Radioterapia Oncologica, IRCCS Istituto Tumori "Giovanni Paolo II", Bari, Italy;(4)U.O. Radioterapia, General Hospital "Perrino", Brindisi, Italy;(5)U.O. di Radioterapia, Aoor Papardo Piemonte, Messina, Italy;(6)S.C di Radioterapia, Istituto Nazionale Tumori Pascale, Napoli, Italy;(7)Radioterapia Opera di S. Pio da Pietralcina, Casa Sollievo della Sofferenza, San Giovanni Rotondo, Italy;

(1)The University of Texas MD Anderson Cancer Center, Radiation Physics, Houston, USA;(2)University of Florida, Radiation Oncology, Gainesville, USA;(3)National Cancer Institute, Division of Cancer Epidemiology and Genetics, Bethesda, USA;(4)Mayo Clinic, Radiation Oncology, Jacksonville Beach, USA;(5)University of Rochester Medical Center, Radiation Oncology, Rochester, USA;

(1)Clatterbridge Cancer Centre, Physics, Bebington- Wirral, United Kingdom;(2)Royal Marsden Hospital, Physics, London, United Kingdom;(3)Clatterbridge Cancer Centre, Radiotherapy, Bebington- Wirral, United Kingdom;