1. Dr. Senckenberg Institute of Pathology, Goethe University, Frankfurt am Main, Germany
2. Department of Internal Medicine 2, Hospital of the J. W. Goethe University, Frankfurt am Main, Germany
3. Department of Pathology, Tampere University Hospital and University of Tampere, Tampere, Finland
4. Institute of Cell Biology (Cancer Research), Faculty of Medicine, University of Duisburg-Essen, Essen, Germany