[1] Netherlands Canc Inst, Dept Radiat Oncol, Amsterdam, Netherlands
[2] Netherlands Canc Inst, Dept Epidemiol, Amsterdam, Netherlands
[3] Erasmus Univ, MC Canc Inst, Dept Radiat Oncol, Rotterdam, Netherlands
[4] Univ Utrecht, Utrecht Inst Pharmaceut Sci, Utrecht, Netherlands
[5] Leiden Univ, Med Ctr, Dept Clin Oncol, Leiden, Netherlands
[6] Netherlands Canc Inst, Div Expt Therapy & Mol Pathol, Amsterdam, Netherlands
[7] Catharina Hosp, Dept Radiotherapy, Eindhoven, Netherlands
[8] Vrije Univ Amsterdam, Med Ctr Amsterdam, Dept Hematol, Amsterdam, Netherlands
[9] Radboud Univ Nijmegen, Med Ctr, Dept Radiat Oncol, Nijmegen, Netherlands
[10] Int Agcy Res Canc, Sect Environm & Radiat, Lyon, France
[11] Gustave Roussy, Dept Clin Res, Villejuif, France