[1] Wayne State Univ, Sch Med, Dept Family Med & Publ Hlth Sci, Detroit, MI 48201 USA
[2] Harvard TH Chan Sch Publ Hlth, Dept Global Hlth & Populat, Boston, MA USA
[3] South Carolina SmartState Ctr HealthCare Qual CHQ, Hlth Promot Educ & Behav, Columbia, SC USA
[4] Guangxi Ctr Dis Control & Prevent, Nanning, Peoples R China
[5] Vanderbilt Univ, Vanderbilt Inst Global Hlth, 221 Kirkland Hall, Nashville, TN 37235 USA
[6] Maternal & Child Hlth Hosp, Jinan, Peoples R China
[7] Natl Hlth & Family Planning Commiss, Key Lab Fertil Regulat & Technol, Jinan, Peoples R China