1. From The UMR 5533 CNRS, Hôpital Cardiologique, Pessac, France; The Division of Hematology, Department of Medicine, The Johns Hopkins University School of Medicine, Baltimore, MD; The Laboratoire Franco-Luxembourgeois de Recherche Biomédicale, Centre Universitaire, Luxembourg; and The Dipartimento di Medicina ed Oncologia Sperimentale, Sezione de Ematologia, University of Turin, Turin, Italy.