1 Department of Hematology, University Hospital of Reims, Reims, France.
2 UFR Médecine, Reims, France.
3 Department of Research and Public Health, University Hospital of Reims, Reims, France.
4 UR 3797, Vieillissement, Fragilité (VieFra), Faculty of Medicine, University of Reims Champagne-Ardenne, Reims, France.
5 Division of Hematology, Department of Internal Medicine, Mayo Clinic, Rochester, MN.
6 Department of Hematology, University Hospital of Strasbourg, Strasbourg, France.
7 Department of Clinical Therapeutics, National and Kapodistrian University of Athens, Athens, Greece.
8 University College London Hospitals (UCLH) NHS Foundation Trust, London, United Kingdom.
9 Department of Hematology, University Hospital of Salamanca (HUS/IBSAL), CIBERONC and Cancer Research Institute of Salamanca-IBMCC (USAL-CSIC), Salamanca, Spain.
10 Department of Hematology and CIC U1402, University Hospital of Poitiers, Poitiers, France.
11 Department of Hematology, Hospital of Lens, Lens, France.
12 Department of Hematology, IUCT Oncopole, Toulouse, France.
13 Amsterdam University Medical Center (UMC) and LYMMCARE, Amsterdam, The Netherlands.
14 Department of Hematology, Léon Bérard Center, Lyon, France.
15 Lymphoid Malignancies Unit, Henri Mondor Hospital, Créteil, France.
16 Inserm U1245 and Department of Hematology, Henri Becquerel Center and Normandie University UNIROUEN, Rouen, France.
17 Department of Hematology, André Mignot Hospital, Versailles, France.
18 Department of Hematology, University Hospital of Besançon, Besançon, France.
19 Department of Hematology, Saint-Louis Hospital, Paris, France.
20 Department of Hematology, University Hospital of Grenoble, Grenoble, France.
21 Department of Hematology, University Hospital of Amiens, Amiens, France.
22 Department of Hematology, Sorbonne University, Pitié-Salpêtrière Hospital, APHP Paris, France; and.
23 Bing Center for Waldenström Macroglobulinemia, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA.