1. Haematology and Oncology; Kantonspital Graubünden; Chur Switzerland
2. Department of Haematology and Medical Oncology; University Medical Centre UMG; Georg August University of Goettingen; Goettingen Germany
3. Institute for Medical Informatics, Statistics and Epidemiology; University of Leipzig; Leipzig Germany
4. Department of Haematology and Oncology; Saarland University Hospital; Homburg Germany
5. Department of Haematology, Oncology and Stem Cell Transplantation; Asklepios Klinik St. Georg; Hamburg Germany
6. Department of Haematology Oncology and Palliative Care; Klinikum Traunstein; Traunstein Germany