1 Division of Cancer Sciences, Faculty of Biology, Medicine and Health, The University of Manchester, The Christie NHS Foundation Trust, United Kingdom.
2 German Cancer Research Center (DKFZ), Heidelberg, Germany.
3 Departments of Radiation Oncology and Biomedical Sciences of Cells & Systems, Section Molecular Cell Biology, University of Groningen, University Medical Center Groningen, The Netherlands.
4 Department of Radiation Oncology, Institut d'Oncologie Thoracique (IOT), Gustave Roussy, France.
5 Division Medical Radiation Physics, Department of Radiation Oncology, Medical University of Vienna/AKH Wien, Austria.
6 Department of Radiation Oncology, University Hospitals Leuven, Belgium.
7 Mount Vernon Cancer Centre and University of Manchester, United Kingdom.
8 Department of Radiotherapy and Radiation Oncology, Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany.
9 Academic Department of Radiotherapy, Oscar Lambret Comprehensive Cancer Center, Lille, France.
10 OncoRay - National Center for Radiation Research in Oncology, Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Helmholtz-Zentrum Dresden - Rossendorf, Dresden, Germany.
11 Department of Experimental Clinical Oncology, Aarhus University Hospital, Aarhus, Denmark.
12 Institute of Medical Physics, School of Physics, The University of Sydney, Australia.
13 Department of Human Oncology, University of Wisconsin School of Medicine and Public Health, Madison, USA.
14 Department of Radiation Oncology, the Netherlands Cancer Institute, Amsterdam, The Netherlands.
15 Dipartimento di Diagnostica per Immagini, Radioterapia Oncologica ed Ematologia, UOC Radioterapia Oncologica, Fondazione Policlinico Universitario "A. Gemelli" IRCCS, Rome, Italy.
16 German Cancer Research Center (DKFZ), Heidelberg, Germany. Electronic address: michael.baumann@dkfz-heidelberg.de.