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Authors
Yan, Pijun https://orcid.org/0000-0001-6692-2401
Zhang, Zhihong
Miao, Ying
Xu, Yong
Zhu, Jianhua
Wan, Qin
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Funding
Funding for this research was provided by:
grants from the Ministry Science and Technology of China (2016YFC0901200, 2016YFC0901205)
research grants from Health and Family Planning Commission of Sichuan Province (16129)
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Article History
Received: 1 January 2020
Accepted: 9 May 2020
First Online: 19 May 2020
Ethics approval and consent to participate
: The study was approved by the ethics committee of the Affiliated Hospital of Southwest Medical University. Written informed consent was obtained before the data collection and analysis.
: Not applicable.
: The authors declare that they have no competing interests.
