[1] Natl Ctr Maternal & Child Hlth, Ulan Bator, Mongolia
[2] Mongolian Natl Univ Med Sci, Sainshand, Mongolia
[3] Brigham & Womens Hosp, Dept Med, Channing Div Network Med, Boston, MA USA
[4] Harvard Med Sch, Boston, MA USA
[5] Harvard TH Chan Sch Publ Hlth, Dept Nutr, Boston, MA USA
[6] Natl Ctr Maternal & Child Hlth Mongolia, Khuvisgalchids St, Ulaanbaatar 16060, Mongolia