1. Department of Medical Oncology, Bern University Hospital, Bern, Switzerland;
2. Department of Hematology, University Hospital, Bern, Switzerland;
3. Department of Oncology, Kantonsspital, Fribourg, Switzerland;
4. Department of Oncology, Kantonsspital, Solothurn, Switzerland;
5. Department of Oncology, Kantonsspital, Lucerne, Switzerland;
6. Department of Medical Oncology, Bern University Hospital, Regionalspital, Thun, Switzerland