[1] Univ Southern Calif, Keck Sch Med, Dept Prevent Med, 2001 N Soto St, Los Angeles, CA 90032 USA
[2] Univ Southern Calif, Keck Sch Med, Dept Dermatol, Los Angeles, CA 90032 USA
[3] Univ Southern Calif, Keck Sch Med, Dept Pediat, Los Angeles, CA USA
[4] Childrens Hosp Los Angeles, Childrens Ctr Canc & Blood Dis, Los Angeles, CA 90027 USA
[5] USC Norris Comprehens Canc Ctr, Los Angeles, CA USA