[1] Harvard Med Sch, Dept Populat Med, Boston, MA USA
[2] Harvard Pilgrim Hlth Care Inst, Boston, MA USA
[3] Harvard TH Chan Sch Publ Hlth, Dept Epidemiol, Boston, MA USA
[4] Univ Michigan, Sch Publ Hlth, Dept Hlth Behav & Hlth Educ, Ann Arbor, MI USA
[5] Univ Michigan, Inst Social Res, Populat Studies Ctr, Ann Arbor, MI USA
[6] Univ Washington, Sch Publ Hlth, Dept Epidemiol, Seattle, WA USA
[7] Yale Sch Publ Hlth, Dept Social & Behav Sci, New Haven, CT USA
[8] Univ Washington, Dept Pediat, Seattle, WA USA
[9] Childrens Hosp Philadelphia, Craig Dalsimer Div Adolescent Med, Philadelphia, PA USA
[10] Univ Penn, Perelman Sch Med, Philadelphia, PA USA
[11] Childrens Hosp Philadelphia, Gender & Sexual Dev Program, Philadelphia, PA USA
[12] West Virginia Univ, Sch Med, Dept Pediat, Morgantown, WV USA
[13] Harvard Med Sch, Dept Populat Med, 401 Pk Dr,Suite 401 East, Boston, MA 02215 USA
[14] Harvard Pilgrim Hlth Care Inst, 401 Pk Dr,Suite 401 East, Boston, MA 02215 USA