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Authors
Li, Yi
Zhang, Xiao-Wen
Liao, Bin
Liang, Jun
He, Wen-Jie
Liu, Jun
Yang, Yao
Zhang, Yun-Hai
Ma, Tao
Wang, Jing-Ying
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Funding
Funding for this research was provided by:
Kunming Municipal Health Commission (2017-12-05-002)
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Article History
Received: 22 March 2020
Accepted: 9 June 2021
First Online: 17 July 2021
Declarations
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: This study was reviewed and approved by the Ethics Committee of Kunming Centers for Disease Control and Prevention. The informed consent obtained from participants was verbal. After the participants agreed to participate in the investigation, we documented the consent one by one. We keep the participants’ information strictly confidential. And the ethics committee approved this procedure because the participants only need cooperate for questionnaire survey without clinic survey.
: Not applicable.
: The authors declare that they have no competing interests.
