Corresponding Author

Division of Birth Cohort Study, Guangzhou Women and Children’s Medical Center, Guangzhou Medical University, Guangzhou, Guangdong, China

Provincial Key Clinical Specialty of Woman and Child Health, Guangdong, China

Provincial Clinical Research Center for Child Health, Guangdong, China

Nuffield Department of Women's and Reproductive Health, University of Oxford, Oxford, UK

Correspondence

Xiu Qiu, PhD; Jianrong He, DPhil, Division of Birth Cohort Study, Guangzhou Women and Children’s Medical Center, Guangzhou Medical University, No. 9 Jinsui Road, Tianhe District, Guangzhou, P.R. China, 510623, Tel.: +86-20-3836-7160 (X.Q.); +86-20-3836-7159 (J.-R.H.).

E-mail: xiu.qiu@bigcs.org or qxiu0161@163.com (X.Q.)

jianrong.he@bigcs.org (J.-R.H.)

Contribution: Conceptualization (equal), Formal analysis (supporting), Project administration (equal), Writing - review & editing (equal)

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