1. 1Department of Pathology, Amsterdam University Medical Center (UMC), Vrije Universiteit Amsterdam, Cancer Center Amsterdam, Amsterdam, The Netherlands;
2. 2Department of Hematology, Radboudumc Nijmegen, Nijmegen, The Netherlands;
3. 3Université Lyon 1, Villeurbanne, France, Centre National de la Recherche Scientifique (CNRS), Unité Mixte de recherche (UMR) 5558, Laboratoire de Biométrie et Biologie Évolutive, Équipe Biostatistique-Santé, Villeurbanne, France;
4. 4Hospices Civils de Lyon, Pôle Santé Publique, Service de Biostatistique et Bioinformatique, Lyon, France;
5. 5Centre for Haemato-Oncology, Barts Cancer Institute, Queen Mary, University of London, London, United Kingdom;
6. 6Department of Laboratory Medicine, Division of Pathology, Karolinska Institute and Karolinska University Hospital, Stockholm, Sweden;
7. 7Institute of Pathology, University of Würzburg, Würzburg, and Comprehensive Cancer Center Mainfranken, Germany;
8. 8Department of Medicine III, University Hospital Grosshadern, Munich, Germany;
9. 9Institute for Medical Information Processing, Biometry, and Epidemiology (IBE), LMU University, Munich, Germany;
10. 10Department of Pathology, Henri Mondor University Hospital, Assistance Pyblique- Hospitaux de Paris (APHP), INSERM U955, Université Paris-Est, Créteil, France;
11. 11Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, NY;
12. 12Institute for Clinical Pathology, Robert-Bosch-Krankenhaus, Dr. Margarete Fischer-Bosch-Institut für Klinische Pharmakologie, Stuttgart, Germany;
13. 13Institute of Pathology, University of Schleswig-Holstein, Kiel, Germany;
14. 14Département de Biopathologie, Institut Paoli-Calmettes, Marseille, France;
15. 15Haematological Malignancy Diagnostic Service, St. James University Hospital, Leeds, United Kingdom;
16. 16Division of Haematology & Immunology, Leeds Institute of Medical Research, University of Leeds, Leeds, United Kingdom;
17. 17Epidemiology & Cancer Statistics Group, Department of Health Sciences, University of York, York, United Kingdom;
18. 18Institute of Experimental Cancer Research, Comprehensive Cancer Center (CCC) Ulm, Universitätsklinikum Ulm, Ulm, Germany;
19. 19BC Cancer Centre for Lymphoid Cancer and The University of British Columbia, Vancouver, BC, Canada;
20. 20Department of Pathology, and
21. 21Department of Hematology, Stanford University School of Medicine, Stanford Cancer Institute, Stanford, CA;
22. 22Department of Medicine, Division of Hematology, Karolinska Institute, Stockholm, Sweden; and
23. 23Department of Hematology, Amsterdam University Medical Center (UMC), University of Amsterdam, Cancer Center Amsterdam, Amsterdam, The Netherlands