1. Department of Hematology; VU Institute of Cancer and Immunology (V-ICI); Cancer Center Amsterdam (CCA); VU University Medical Center; Amsterdam The Netherlands
2. Department of Hematology; University Medical Center Groningen; Groningen The Netherlands
3. Department of Hematology; Radboud University Nijmegen Medical Center; Amsterdam The Netherlands
4. Department of Epidemiology and Biostatistics; VU University Medical Center; Amsterdam The Netherlands
5. UF Ematologia; Azienda Ospedaliero Universitaria Careggi; University of Florence; Florence Italy