1. Department of Radiation Oncology and Radiotherapy, Klinikum rechts der Isar, Technische Universität München (TUM), München, Germany;
2. Medical Photobiology Group, Department of Internal Medicine, Charité University Medicine, Berlin, Germany;
3. Physical Optics Consultant Office, Wetzlar, Germany;
4. Department of Radiation Oncology, Lindenhofspital, Bern, Switzerland