1. Department of Radiation Oncology, Charité – Universitätsmedizin Berlin, Berlin, Germany
2. Institute for Applied Mathematics and Physics, Zurich University of Applied Sciences, Winterthur, Switzerland
3. Experimental and Clinical Research Center, Charité–Universitätsmedizin Berlin and Max-Delbrück-Centrum (MDC), Berlin, Germany
4. Ferdinand-Braun-Institut (FBH), Leibnitz-Institut für Höchstfrequenztechnik, Berlin, Germany