1 Department of Radiation Oncology, Antoine Lacassagne Cancer Centre, University of Côte d'Azur, 33 Avenue Valombrose, 06107, Nice CEDEX, France. jean-michel.hannoun-levi@nice.unicancer.fr.
2 Center of Radiotherapy, National Institute of Oncology, Budapest, Hungary.
3 Department of Oncology, Semmelweis University, Budapest, Hungary.
4 Department of Radiation Oncology, Erlangen University Hospital, Erlangen, Germany.
5 Department of Radiation Oncology, Catalan Institute of Oncology, Barcelona, Spain.