(1)Medical University Vienna, Department of Radiation Oncology, Vienna, Austria;(2)Aarhus University Hospital, Department of Oncology, Aarhus, Denmark;(3)Gustave-Roussy, Department of Radiotherapy, Villejuif, France;(4)Mount Vernon Hospital, Mount Vernon Cancer Centre, Northwood, United Kingdom;(5)Tata Memorial Hospital, Department of Radiation Oncology, Mumbai, India;(6)Institute of Oncology Ljubljana, Department of Radiotherapy, Ljubljana, Slovenia;(7)The Norwegian Radium Hospital- Oslo University Hospital, Department of Oncology, Oslo, Norway;(8)Cross Cancer Institute and University of Alberta, Department of Oncology, Edmonton, Canada;(9)Postgraduate Institute of Medical Education and Research, Department of Radiotherapy and Oncology, Chandigarh, India;(10)St James's University Hospital, Leeds Cancer Centre, Leeds, United Kingdom;(11)Radiotherapiegroep Arnhem, Department of Radiotherapy, Arnhem, The Netherlands;(12)UZ Leuven, Department of Radiation Oncology, Leuven, Belgium;(13)Amsterdam UMC- Academic Medical Center- University of Amsterdam, Department of Radiation Oncology, Amsterdam, The Netherlands;(14)Addenbrooke´s Hospital- Cambridge University Hospitals, Department of Oncology, Cambridge, United Kingdom;(15)Leiden University Medical Center, Department of Radiation Oncology, Leiden, The Netherlands;(16)University Medical Centre Utrecht, Department of Radiation Oncology, Utrecht, The Netherlands;(17)EMBRACE Collaborative Group, EMBRACE Collaborative Group, EMBRACE Collaborative Group, Austria;

(1)UMC Utrecht, Radiation Oncology, Utrecht, The Netherlands;(2)UMC Utrecht, Computational imaging group for MR diagnostic & therapy, Utrecht, The Netherlands;

(1)Ospedale Clinicizzato S.S. Annunziata, Radiotherapy Oncology- Chieti, Chieti, Italy;(2)Ospedale Clinicizzato S.S. Annunziata, Department of Radiology, Chieti, Italy;(3)G. D’Annunzio University, Laboratory of Biostatistics- Department of Medical- Oral and Biotechnological Sciences, Chieti, Italy;

(1)Brigham and Women's Hospital and Dana-Farber Cancer Institute, Radiation Oncology, Boston, USA;(2)Yale, Therapeutic Radiology, New Haven, USA;(3)Duke Cancer Center, Radiation Oncology, Durham, USA;(4)University of Pennsylvania, Radiation Oncology, Philadelphia, USA;(5)The University of Texas MD Anderson Cancer Center, Radiation Oncology, Houston, USA;(6)University of Maryland, Radiation Oncology, Baltimore, USA;(7)University of Wisconsin, Department of Human Oncology, Madison, USA;(8)University of Colorado, Radiation Oncology, Denver, USA;(9)Virginia Commonwealth University, Radiation Oncology, Richmond, USA;

(1)Erasmus MC Cancer Institute, Department of Radiation Oncology, Rotterdam, The Netherlands;

(1)Aarhus University Hospital, Dept. of Experimental Clinical Oncology, Aarhus, Denmark;