[1] Sichuan Univ, West China Univ Hosp 2, Sect Epidemiol & Populat Hlth, Chengdu 610041, Peoples R China
[2] Sichuan Univ, West China Univ Hosp 2, Dept Gynecol & Obstet, Minist Educ,Key Lab Birth Defects & Related Dis W, Chengdu 610041, Peoples R China
[3] Sichuan Univ, West China Univ Hosp 2, Childrens Med Key Lab Sichuan Prov, Chengdu 610041, Peoples R China
[4] Sichuan Univ, West China Hosp, West China Biomed Big Data Ctr, Chengdu, Peoples R China
[5] Shuangliu Maternal & Child Hlth Hosp, Shuangliu Inst Womens & Childrens Hlth, Chengdu, Peoples R China
[6] Tianjin Med Univ, Sch Publ Hlth, Dept Toxicol & Sanit Chem, Tianjin 300070, Peoples R China
[7] Tianjin Key Lab Environm Nutr & Publ Hlth, Tianjin, Peoples R China