1 Lung Unit, Royal Marsden Hospital, London, United Kingdom; Division of Radiotherapy & Imaging, The Institute of Cancer Research, London, United Kingdom.
2 Department of Radiation Oncology, University Hospital, LMU Munich, Germany; German Cancer Consortium (DKTK), Partner Site Munich, Germany; Bavarian Cancer Research Center (BZKF), Munich, Germany.
3 Department of Radiation Oncology, Catharina Hospital Eindhoven, Eindhoven, Netherlands.
4 Department of Oncology and Hemato-oncology, University of Milan, Milan, Italy; Department of Radiation Oncology, IEO European Institute of Oncology IRCCS, Milan, Italy.
5 Department of Radiation Oncology, Iridium Netwerk, Antwerp, Belgium; Faculty of Medicine and Health Sciences, University of Antwerp, Belgium.
6 Department of Radiation Oncology, The Netherlands Cancer Institute, Amsterdam, Netherlands.
7 European Society for Radiotherapy and Oncology, Brussels, Belgium.
8 Department of Translational Medicine (DIMET), University of Eastern Piedmont, Novara, Italy; Department of Radiation Oncology, 'Maggiore della Carità' University Hospital, Novara, Italy. Electronic address: [email protected].