[1] Univ Southern Calif, Leonard Davis Sch Gerontol, Los Angeles, CA 90089 USA
[2] USC Dornsife Coll Letters Arts & Sci, Mol & Computat Biol Dept, Los Angeles, CA 90089 USA
[3] USC Keck Sch Med, Biochem & Mol Med Dept, Los Angeles, CA 90089 USA
[4] USC Norris Comprehens Canc Ctr, Epigenet & Gene Regulat, Los Angeles, CA 90089 USA
[5] USC Stem Cell Initiat, Los Angeles, CA 90089 USA