[1] UCLouvain, de Duve Inst, Brussels, Belgium
[2] CHU La Pitie Salpetriere, Serv Hematol, Paris, France
[3] French Registry Familial Lymphoid Neoplasms, Paris, France
[4] Hop Armand Trousseau, Serv Hematol & Oncol Pediat, Paris, France
[5] Ctr Hosp Versailles, Unite Hematooncol, Le Chesnay, France
[6] INSERM, Unit 1018, Ctr Res Epidemiol & Populat Hlth CESP, Villejuif, France
[7] Belgian Canc Registry, Brussels, Belgium