1. Signals and Systems, Chalmers University of Technology, Göteborg, Sweden;
2. Radiotherapy, AMC, Amsterdam, The Netherlands;
3. Radiotherapy Clinics, Universitatsklinikum Erlangen, Erlangen, Germany;
4. Kantonsspital Aarau, Aarau, Switzerland;
5. Radiation Oncology, University Hospital Tuebingen, Tuebingen, Germany;
6. Radiation Oncology, University Medical Centre Mannheim, Mannheim, Germany;
7. Klinik für Radioonkologie und Strahlentherapie, Campus Virchow Klinikum, Charite Universitatsmedizin Berlin, Berlin, Germany;
8. Praxis/Zentrum für Strahlentherapie und Radioonkologie, Berlin, Germany;
9. Radiation Oncology, Erasmus MC Daniel den Hoed Cancer Center, Rotterdam, The Netherlands;
10. Department of Internal Medicine III, Ludwig Maximilians University of Munich, Munich, Germany;
11. Department of Biophysics, GSI - Helmholtz Centre for Heavy Ion Research, Darmstadt, Germany;
12. Department of Radiation Oncology, Thomas Jefferson University, Philadelphia, PA, USA;
13. Department of Radiation Oncology, UCSF, San Francisco, CA, USA