[1] Charite, Dept Radiat Oncol, Berlin, Germany
[2] Univ Hosp Bern, Dept Radiat Oncol, Bern, Switzerland
[3] Univ Halle, Halle, Germany
[4] Tenon Univ Hosp, Dept Radiat Oncol, Paris, France
[5] Ctr Hosp Lisboa Norte EPE Santa Maria, Dept Radiat Oncol, Lisbon, Portugal
[6] EORTC, Brussels, Belgium
[7] Azienda Osped Univ Careggi, Dept Oncol, Florence, Italy
[8] Campus Biomed, Radiat Oncol, Rome, Italy
[9] Royal Marsden NHS Fdn Trust, Inst Canc Res, Radiotherapy & Imaging, London, England
[10] Radboud Univ Nijmegen, Med Ctr, Dept Radiat Oncol, Nijmegen, Netherlands
[11] Rambam Med Ctr, Inst Oncol, Radiat Oncol & Neuroncol Unit, Haifa, Israel
[12] Univ Hosp Leuven, Expt Radiat Oncol Lab, Leuven, Belgium
[13] Univ Antwerp, MIPRO, Antwerp, Belgium
[14] Iridium Canc Network, Dept Radiat Oncol, Antwerp, Belgium
[15] Univ Hosp CHRU Morvan, Dept Radiat Oncol, Brest, France
[16] Copenhagen Univ Hosp, Rigshosp, Dept Oncol, Copenhagen, Denmark
[17] Univ Hosp Bonn, Dept Radiat Oncol, Bonn, Germany
[18] Fundan Univ, Shanghai Canc Ctr, Dept Radiat Oncol, Shanghai, Peoples R China
[19] Univ Freiburg, Dept Radiat Oncol, Med Ctr, Fac Med, Freiburg, Germany
[20] German Canc Consortium DKTK, Partner Site Freiburg, Freiburg, Germany
[21] German Canc Res Ctr, Heidelberg, Germany