1 Department of Hematology and Medical Oncology, Winship Cancer Institute, and Department of Pediatrics, Emory University School of Medicine, Atlanta, Georgia, USA. Electronic address: jgalipe@emory.edu.
2 Section of Hematology, Stem Cell Research Laboratory and Cell Factory, Department of Medicine, University of Verona, Policlinico G.B. Rossi, P.le L.A., Italy.