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Authors
Yuan, Ping
Xiang, Jianjun
Borg, Matthew
Chen, Tiehui
Lin, Xiuquan
Peng, Xiane
Zheng, Kuicheng http://orcid.org/0000-0001-5385-362X
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Funding
Funding for this research was provided by:
National Health and Family Planning Commission Research Fund (No. wsj-fj-18)
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Article History
Received: 2 February 2020
Accepted: 2 July 2020
First Online: 11 July 2020
Ethics approval and consent to participate
: Not applicable. All data analyzed in this study were sourced from publicly available books.
: Not applicable.
: The authors declare that they have no competing interests.
