1. University Hospital Cologne Department I of Internal Medicine Center for Integrated Oncology Aachen Bonn Cologne Duesseldorf German CLL Study Group Cologne Germany
2. Practice for Oncology and Hematology Landshut Germany
3. Ulm University Division of CLL Department of Internal Medicine III Ulm Germany
4. Practice for Oncology and Hematology Leer Germany
5. Practice for Oncology and Hematology Würzburg Germany
6. Practice for Oncology and Hematology Hildesheim Germany
7. Brüderkrankenhaus St. Josef Department of Hematology and Oncology Paderborn Germany
8. Practice for Oncology and Hematology Marburg Germany
9. Practice for Oncology and Hematology Cologne Germany
10. Practice for Oncology and Hematology Kronach Germany
11. Practice for Oncology and Hematology Goslar Germany
12. Onkozentrum Dresden Freiberg Dresden Germany
13. Practice for Oncology and Hematology Erlangen Germany
14. St Antonius Hospital Eschweiler Eschweiler Germany
15. Practice for Oncology and Hematology Halle Germany
16. Practice for Oncology and Hematology Mannheim Germany
17. Stauferklinikum Schwäbisch Gmünd Department for Internal Medicine, Hematology and Oncology Mutlangen Germany
18. Practice for Oncology and Hematology Neunkirchen Germany
19. University Hospital Hamburg ‐ Eppendorf Department II Medical Clinic and Polyclinic, Oncology, Hematology and Bone Marrow Transplantation Hamburg Germany
20. Practice for Oncology and Hematology Münster Germany
21. Practice for Oncology and Hematology Erfurt Germany
22. Practice for Oncology and Hematology Augsburg Germany
23. Klinikum Schwabing Department of Hematology, Oncology, Immunology Palliative Care Infectious Diseases and Tropical Medicine Munich Germany