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Authors
Zhou, Yehong
Zhang, Junjie
Wu, Wenwen
Liang, Man
Wu, Qiang-Song
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Article History
Received: 30 November 2020
Accepted: 26 May 2021
First Online: 9 June 2021
Declarations
: All of the authors declared no conflict of interests. There is no financial support for this project.
: This study was approved by the Ethics Review Board of Xuhui District Center for Disease Control and Prevention (No. XHCDC202001). Informed consent from participants was obtained prior to scanning the QR code to complete the questionnaire. Anonymity was guaranteed to participants.
: Not applicable.
: The authors declare they have no competing interests.
