Ji, Lujun
Ren, Zhisheng
Chen, Jian
Zhao, Hui
Zhang, Xiaofei
Xue, Bai
Zhang, Dongfeng
Article History
Received: 25 December 2023
Accepted: 26 May 2024
First Online: 4 June 2024
Declarations
:
: This study was approved by the Medical Ethics Committee of the Qingdao Centers for Disease Control and Prevention. Written informed consent to participate was obtained from all the study subjects before enrollment.
: Not applicable.
: The authors declare that they have no competing interests.