Wang, Tong
Wang, Weijing
Li, Weilong
Duan, Haiping
Xu, Chunsheng
Tian, Xiaocao
Zhang, Dongfeng http://orcid.org/0000-0001-9308-9371
Article History
Received: 22 June 2021
Accepted: 12 November 2021
First Online: 22 November 2021
Declarations
:
: Informed written consents were obtained from all participants. Regional Ethics Committee of the Qingdao Centers for Disease Control and Prevention Institutional Review Boards has approved this study.
: Not applicable.
: The authors have declared no conflicts of competing interests.