1. 1Department of Hematology, University Medical Center Groningen, Groningen, The Netherlands
2. 2Department of Hematology, Amsterdam UMC location University of Amsterdam, Amsterdam, The Netherlands
3. 3Cancer Center Amsterdam, Amsterdam, The Netherlands
4. 4LYMMCARE (Lymphoma and Myeloma Center Amsterdam), Amsterdam, The Netherlands
5. 5Erasmus School of Health Policy and Management, Erasmus University Rotterdam, Rotterdam, The Netherlands
6. 6Department of Internal Medicine, Rivierenland Hospital, Tiel, The Netherlands
7. 7Department of Hematology, Erasmus MC Cancer Institute, University Medical Center Rotterdam, Rotterdam, The Netherlands
8. 8Department of Hematology, University Medical Center Utrecht, Utrecht, The Netherlands
9. 9Department of Internal Medicine, Division of Hematology, GROW school for Oncology and Developmental Biology, Maastricht University Medical Center, Maastricht, The Netherlands
10. 10Department of Hematology, Amsterdam UMC location Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
11. 11Department of Radiology and Nuclear Medicine, Amsterdam UMC location University of Amsterdam, Amsterdam, The Netherlands
12. 12Department of Pathology and Medical Biology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
13. 13Department of Pathology, Cancer Center Amsterdam, Amsterdam UMC location University of Amsterdam, Amsterdam, The Netherlands
14. 14Department of Hematology, Radboud University Medical Center, Nijmegen, The Netherlands
15. 15Department of Hematology, Leiden University Medical Center, Leiden, The Netherlands
16. 16Department of Radiation Oncology, University Medical Center Groningen, Groningen, The Netherlands