1. Department of Oncology, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark
2. Department of Haematology, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark
3. EORTC Headquarters, Brussels, Belgium
4. Department of Internal Medicine, Amstelland Hospital, Amstelveen, The Netherlands
5. EORTC Headquarters, Brussels, Belgium (Present affiliation: Belgian Cancer Registry, Brussels, Belgium);
6. Department of Radiation Oncology, Iridium Network, University of Antwerp, Antwerpen, Belgium
7. Department of Radiation Oncology, The Netherlands Cancer Institute, Amsterdam, The Netherlands
8. Department of Hematology, Radboud University Medical Center, Nijmegen, The Netherlands
9. Department of Hematology, University Medical Centre Groningen, University of Groningen, Groningen, The Netherlands
10. Division of Medical Oncology and Immunerelated tumors, Centro di Riferimento Oncologico di Aviano (CRO), IRCCS, Aviano, Italy
11. Department of Hematology, Gustave Roussy, Villejuif, France
12. AP-HP, Hôpital Saint-Louis, Hemato-oncologie, DMU DHI; Université de Paris, Paris, France
13. Department of Hematology, CHU Dijon-Bourgogne, Dijon, France
14. Department of Hematology, Centre Henri Becquerel, Rouen, France
15. Department of Hematology, CHU UCL NAMUR, Yvoir, Belgium
16. Unité Hémopathies Lymphoïdes, Hôpital Henri Mondor, Créteil, France
17. Centre de Traitement des Données du Cancéropôle Nord-Ouest, Centre François Baclesse, Caen, France