[1] Boston Univ, Sch Med, Boston Med Ctr, Div Gen Pediat, Boston, MA 02118 USA
[2] Univ Calif San Diego, Sch Med, Div Infect Dis & Global Publ Hlth, Ctr Gender Equ & Hlth, La Jolla, CA 92093 USA
[3] Rady Childrens Hosp, Div Adolescent & Young Adult Med, San Diego, CA USA
[4] Univ Calif San Diego, Sch Med, La Jolla, CA 92093 USA