1. Department of Internal Medicine, Division of Oncology and Hematology; Paracelsus Medical University, Klinikum Nuremberg; Nuremberg Germany
2. Medizinische Klinik mit Schwerpunkt Haematologie und Onkologie; Vivantes Klinikum; Berlin Germany
3. Institute of General Practice; Klinikum rechts der Isar, Technical University Munich; München Germany
4. University Cancer Center Hamburg, Hubertus Wald Tumor Center; University Medical Center Hamburg-Eppendorf; Hamburg Germany