[1] Shanghai Jiao Tong Univ, Xinhua Hosp, Dept Pediat, Sch Med,Minist Educ, Shanghai, Peoples R China
[2] Shanghai Jiao Tong Univ, Xinhua Hosp, Dept Pediat, Sch Med,Shanghai Key Lab, Shanghai, Peoples R China
[3] Univ Toronto, Mt Sinai Hosp, Prosserman Ctr Populat Hlth Res,Inst Hlth Policy, Lunenfeld Tanenbaum Res Inst,Dept Obstet & Gyneco, Toronto, ON, Canada
[4] Shanghai Jiao Tong Univ, Xinhua Hosp, Dept Obstet & Gynecol, Sch Med, Shanghai, Peoples R China
[5] Shanghai Jiao Tong Univ, Sch Med, Xinhua Hosp, Shanghai, Peoples R China
[6] Shanghai Jiao Tong Univ, Sch Med, Chongming Branch, Shanghai, Peoples R China
[7] Shanghai Jiao Tong Univ, Sch Publ Hlth, Sch Med, Shanghai, Peoples R China
[8] Shanghai Jiao Tong Univ, Int Peace Matern & Child Hosp, Sch Med, Shanghai, Peoples R China
[9] Shanghai Jiao Tong Univ, Shanghai Childrens Med Ctr, Sch Med, Shanghai, Peoples R China
[10] Shanghai Childrens Hosp, Shanghai, Peoples R China
[11] Shanghai Jiao Tong Univ, Renji Hosp, Sch Med, Shanghai, Peoples R China
[12] Fudan Univ, Obstet & Gynecol Hosp, Shanghai, Peoples R China
[13] Tongji Univ, Shanghai First Matern & Infant Care Hosp, Shanghai, Peoples R China
[14] Shanghai Jiao Tong Univ, Bio X Inst, Sch Med, Shanghai, Peoples R China
[15] Maternal & Child Hlth Inst Yangpu Dist, Shanghai, Peoples R China