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Authors
Zhang, Lulu
Zhang, Lin
Li, Meng
Xi, Jie
Zhang, Xiaohua
Meng, Zhenni
Wang, Ying
Li, Huaping
Liu, Xiaohua
Ju, Feihua
Lu, Yuping
Tang, Huijun
Qin, Xianju
Ming, Yanhong
Huang, Rong
Li, Guohong
Dai, Hongying
Zhang, Rong
Qin, Min
Zhu, Liping
Zhang, Jun http://orcid.org/0000-0003-0441-9303
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Funding
Funding for this research was provided by:
Shanghai Municipal Population and Family Planning Commission (GWIV-26)
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Article History
Received: 12 September 2019
Accepted: 7 January 2020
First Online: 14 February 2020
Ethics approval and consent to participate
: An ethical approval was obtained from the Ethics Review Board of the Xinhua hospital, Shanghai Jiao Tong University School of Medicine and other participating hospitals. Conventional informed consent was not necessary in this study.
: Not applicable.
: The authors declare that they have no competing interests.
