[1] Univ North Carolina Chapel Hill, Gillings Sch Global Publ Hlth, Dept Maternal & Child Hlth, 170 Rosenau Hall,CB 7400,135 Dauer Dr, Chapel Hill, NC 27599 USA
[2] Univ North Carolina Chapel Hill, Carolina Populat Ctr, Chapel Hill, NC USA
[3] Columbia Univ, Sch Nursing, New York, NY USA
[4] Univ North Carolina Chapel Hill, Gillings Sch Global Publ Hlth, Dept Epidemiol, Chapel Hill, NC USA
[5] Inst Clin Effectiveness & Hlth Policy IECS, Dept Mother & Child Hlth, Buenos Aires, Argentina
[6] Innovat Poverty Act Kenya IPA K, Nairobi, Kenya
[7] Kisumu Cty Dept Hlth, Kisumu, Kenya
[8] Univ Med Ctr, Julius Ctr Hlth Sci & Primary Care, Julius Global Hlth, Utrecht, Netherlands
[9] Univ Wisconsin, Sch Med & Publ Hlth, Dept Obstet & Gynecol, Madison, WI USA