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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)
grants from the Ministry Science and Technology of China (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.
