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Authors
Liu, Peipei
Fan, Jiajun
Wang, Ziyu
Zai, Wenjing
Song, Ping
Li, Yongping
Ju, Dianwen
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Funding
Funding for this research was provided by:
National Natural Science Foundation of China (81773620)
National Natural Science Foundation of China (81803529)
National Natural Science Foundation of China (81573332)
Shanghai Sailing Program (17YF1405100)
Key Specialty Construction Project of Pudong Health and Family Planning Commission of Shanghai (PWZzk2017-32)
PDH-SPFDU Joint Research Fund
Jiangsu Provincial Commission of Health and Family Planning (201640036)
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Article History
Received: 17 May 2020
Accepted: 27 May 2020
First Online: 3 June 2020
Ethics approval and consent to participate
: Not applicable.
: All authors read the manuscript and expressed their consent for publication.
: The authors declare that they have no competing interests.
