作者单位:Univ Calif Irvine, Dept Dev & Cell Biol, Sue & Bill Gross Stein Cell Res Ctr, Irvine, CA 92697 USA[1]Univ Paris 07, INSERM, Cellules Souches & Radiat, CEA,UMR 967, Fontenay Aux Roses, France[2]Thomas Jefferson Univ, Jefferson Med Coll, Philadelphia, PA 19107 USA[3]