Department of Hematology and Oncology, Hammoud Hospital University Medical Center, Saida, Lebanon. Department of Pathology and Laboratory Medicine, Henry Ford Hospital, Wayne State University, Detroit, MI, USA. Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX, USA. Service d'hématologie clinique et thérapie cellulaire, Hôpital Saint-Antoine, INSERM UMRs 938 and université Sorbonne, Paris, France. Bone Marrow Transplantation Program, Department of Internal Medicine, American University of Beirut Medical Center, Beirut, Lebanon. bazarbac@aub.edu.lb.