[1] Univ Penn, Dept Obstet & Gynecol, Perelman Sch Med, Philadelphia, PA 19104 USA
[2] NYU, Baruch Coll, Sch Publ Affairs, Sch Med, New York, NY USA
[3] Icahn Sch Med Mt Sinai, Blavatnik Family Womens Hlth Res Inst, New York, NY 10029 USA
[4] Icahn Sch Med Mt Sinai, Dept Populat Hlth Sci & Policy, New York, NY 10029 USA
[5] Tufts Univ, Sch Med, Boston, MA 02111 USA
[6] Univ Paris, CRESS, Obstetr Perinatal & Pediat Epidemiol Res Team, EPOPe,Inserm,Inrae, F-75004 Paris, France