1. Department I of Internal Medicine, Center for Integrated Oncology Aachen Bonn Cologne Duesseldorf and German CLL Study Group University of Cologne Cologne Germany
2. Department of Hematology and Oncology Evangelical Hospital Hamm Hamm Germany
3. Practice for Hematology and Oncology Koblenz Germany
4. Department of Internal Medicine Frankfurt (Oder) General Hospital Frankfurt/Oder Germany
5. Department II of Internal Medicine University Hospital Tübingen Tübingen Germany
6. Department of Hematology and Oncology Hospital STS AG Thun Thun Switzerland
7. Practice for Oncology Würzburg Germany
8. Oncology and Palliative Care, Dayclinic Landshut Landshut Germany
9. Private Oncology Practice Villingen‐Schwenningen Germany
10. Private Oncology Practice Mannheim Germany
11. Division of Hematology Cantonal Hospital of Lucerne Lucerne Switzerland
12. Department of Hematology and University of Southern Denmark Vejle Hospital Vejle Denmark
13. Hematopathology Section Christian‐Albrechts‐University Kiel Kiel Germany
14. Department II of Internal Medicine University of Schleswig‐Holstein Kiel Germany
15. Department of Hematology, Cellular Therapy, Hemostaseology and Infectiology University Hospital Leipzig Leipzig Germany
16. Department III of Internal Medicine University Hospital of Ulm Ulm Germany
17. Department III of Internal Medicine University Hospital, LMU Munich Germany
18. Department III of Internal Medicine Medicine—Hematology/Oncology/Palliative Care Rostock University Medical Center Rostock Germany