1. Department I of Internal Medicine and Center of Integrated Oncology Cologne Bonn, University of Cologne, Cologne, Germany.
2. Clinic for Hematology, Oncology and Stem Cell Transplantation, University Hospital of Freiburg, Freiburg, Germany.
3. Department of Hematology, Oncology and Tumor Immunology, HELIOS Clinic Berlin-Buch, Berlin, Germany.