1. Sue and Bill Gross Stem Cell Research Center, Chao Family Comprehensive Cancer Center, Department of Biomedical Engineering and Department of Pharmaceutical Sciences, University of California, Irvine, USA
2. Department of Molecular Therapeutics, The Scripps Research Institute, Jupiter, FL, USA
3. Haematopoietic Stem Cell Laboratory Cancer Research UK, London Research Institute, Lincoln's Inn Fields Laboratories, London, UK
4. Laboratory of Cell Biology and Advanced Cancer Therapies, Department of Medical and Surgical Sciences for Children & Adults, University Hospital of Modena and Reggio Emilia, Modena, Italy
5. 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