[1] Univ Calif San Francisco, Dept Epidemiol & Biostat, San Francisco, CA 94143 USA
[2] Univ Calif Berkeley, Sch Publ Hlth, Berkeley, CA USA
[3] NEERMAN, Mumbai, India
[4] Int Food Policy Res Ctr, New Delhi, India
[5] Univ Calif San Francisco, Dept Obstet Gynecol & Reprod Sci, San Francisco, CA USA