[1] Boston Univ, NIH, Ctr Biomed Res Excellence COBRE Stem Cell Biol, Roger Williams Canc Med Ctr,Sch Med, Providence, RI 02908 USA
[2] Boston Univ, Sch Med, Dept Dermatol, Boston, MA 02118 USA
[3] Boston Univ, Sch Med, Ctr Regenerat Med, Boston, MA 02118 USA
[4] Harvard Univ, Sch Med, Cardiovasc Res Ctr, Massachusetts Gen Hosp, Boston, MA USA
[5] Univ Calif San Diego, Mol Biol Sect, Div Biol Sci, La Jolla, CA 92093 USA
[6] Chengdu Womens & Childrens Cent Hosp, Chengdu, Sichuan, Peoples R China