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Authors
Zhou, Qi
Sun, Jie
Wu, Zhu
Wu, Wenbin
Zhang, Xianbo
Pan, Qi
Qi, Haimei
Yuan, Huiping
Shi, Hong
Cao, Suyan
Yang, Ze
Wang, Xiaoxia
Sun, Liang
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Article History
Received: 2 September 2021
Accepted: 25 March 2022
First Online: 20 April 2022
Declarations
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: The three survey protocols were approved by the Institutional Review Board of the Centers for Disease Control and Prevention of America (Protocol #2005–06, #2011–17, and #2018–01), the Ethical Review Committee of the Chinese Centre for Disease Control and Prevention (No. 201519-A), and the Institutional Ethics Committee at Beijing Hospital, respectively (No. 11 T-2019-03-03). The study was carried out following the guidelines of the Declaration of Helsinki and Good Clinical Practice and informed consent was obtained from all the participants included in the study.
: Not applicable.
: The authors declare that they have no competing interests.
