1. From the Department of Hematology (M.J.-L., T.G., F.G.K., A.H., A.Z., C.A.J.E.-V., M.A.S., B.L., P.J.M.V.) and HOVON Data Center, Department of Hematology (P.L.G., R.M.), Erasmus University Medical Center, Erasmus MC Cancer Institute, Rotterdam, the Department of Hematology, VU University Medical Center (D.H., J.C., G.J.O., G.J.S.), and the Department of Hematology, Academic Medical Center (B.J.B.), Amsterdam, and Isala Hospital, Zwolle (M.M.K.) — all in the Netherlands; UCL Namur (Godinne), Yvoir (C.G.)...