Zheng, Kang
Du, Lanfang
Cao, Yu
Niu, Zhendong
Song, Zhenju
Liu, Zhi
Liu, Xiaowei
Xiang, Xudong
Zhou, Qidi
Xiong, Hui
Chen, Fengying
Zhang, Guoqiang
Ma, Qingbian
Article History
Received: 1 October 2021
Accepted: 23 February 2022
First Online: 28 February 2022
Declarations
:
: This study was performed in accordance with the Declaration of Helsinki. All methods were carried out in accordance with relevant guidelines and regulations. This study was conducted after receiving research ethics approval from Peking University Third Hospital Medical Science Research Ethics Committee (M2018030). All participants signed written informed consent before participating in the survey.
: Not applicable.
: The authors declare that they have no competing interests.