[1] Univ Manchester, Manchester, Lancs, England
[2] Christie Hosp, Div Canc Sci, Sch Med Sci, Fac Biol Med & Hlth, Manchester, Lancs, England
[3] Dept Radiotherapy Related Res, Manchester, Lancs, England
[4] Cantonal Hosp Aarau, Dept Radiat Oncol, Aarau, Switzerland
[5] Ctr Henri Becquerel, Dept Radiotherapy, Rouen, France
[6] Erasmus Univ, Erasmus Sch Hlth Policy & Management Hlth Care Go, Rotterdam, Netherlands
[7] Bern Univ Hosp, Bern, Switzerland
[8] Univ Bern, Div Med Radiat Phys, Inselspital, Bern, Switzerland
[9] Univ Bern, Dept Radiat Oncol, Inselspital, Bern, Switzerland
[10] Maastricht Univ, Lab M, Dept Precis Med, GROW Sch Oncol & Reprod, Maastricht, Netherlands
[11] Univ Milan, Dept Oncol & Hematooncol, Milan, Italy
[12] European Inst Oncol IRCCS, Div Radiat Oncol, IEO, Milan, Italy
[13] Maria Sklodowska Curie Natl Res Inst Oncol, Dept Soft Tissue Bone Sarcoma & Melanoma, Warsaw, Poland
[14] Erasmus MC, Erasmus MC Canc Inst, Dept Radiotherapy, Rotterdam, Netherlands
[15] Univ Piemonte Orientale, Dept Translat Med, Novara, Italy