Hématopoïèse humaine : des cellules CD34 aux lymphocytes T Marina Cavazzana-Calvo, Emmanuelle Six, Isabelle André-Schmutz and Laure Coulombel Med Sci (Paris), 23 2 (2007) 151-160 Published online: 15 February 2007 DOI: 10.1051/medsci/2007232151