1. Institute of Cell Biology (Cancer Research), University Hospital, University of Duisburg-Essen, Essen, Germany.
2. Department of Chemical Biology, Faculty of Biology, Center for Medical Biotechnology, University of Duisburg-Essen, Essen, Germany.
3. Institute for Pharmacology, University Hospital, Heinrich-Heine-University, Düsseldorf, Germany.
4. Department of Physiology, Kochi Medical School, Kochi, Japan.
5. Department of Radiotherapy, University of Duisburg-Essen, University Hospital, Essen, Germany.