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Authors
Ding, Peng-Xu https://orcid.org/0000-0001-9595-5720
Han, Xin-Wei
Liu, Chao
Ding, Jia-Yin
Lee, Edward Wolfgang
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Funding
Funding for this research was provided by:
Health and Family Planning Commision of Henan Province (2017016)
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Article History
Received: 29 January 2019
Accepted: 19 July 2019
First Online: 24 July 2019
Compliance with Ethical Standards
:
: The authors declare that they have no conflict of interest.
: For this type of study, formal consent is not required.
: For this type of study, consent for publication is not required.
