1. From Internal Medicine (C.B., A.G.) and Hematology (N.I.), University Hospital, Angers, France; INSERM 771 (C.B., L.L., D.H.), Angers, France; and Hematology (A.L.), Radiology (E.P., J.-P.L.), and Internal Medicine (H.L.), University Hospital, Rouen, France.