[1] Clin Grangettes, Dept Radiat Oncol, Geneva, Switzerland
[2] Champalimaud Canc Ctr, Dept Radiat Oncol, Lisbon, Portugal
[3] EORTC Headquarters, Dept Stat, Brussels, Belgium
[4] Radboud Univ Nijmegen, Med Ctr, Dept Radiat Oncol, NL-6525 ED Nijmegen, Netherlands
[5] Netherlands Canc Inst, Dept Surg, Amsterdam, Netherlands
[6] Med Ctr Utrecht, Dept Radiat Oncol, Utrecht, Netherlands
[7] Univ Amsterdam, Acad Med Ctr, Dept Radiat Oncol, Meibergdreef 9, NL-1105 AZ Amsterdam, Netherlands
[8] Netherlands Canc Inst, Dept Radiat Oncol, Amsterdam, Netherlands
[9] Inst Curie, Dept Radiat Oncol, Paris, France