Zhang, Xi
Chen, Hui
Zhou, Jing
Huang, Qian
Feng, Xiao-yu
Li, Jing
Article History
Received: 6 August 2021
Accepted: 8 February 2022
First Online: 23 February 2022
Declarations
:
: The study was conducted according to the guidelines of the Declaration of Helsinki. The study protocol was approved by both the Clinical Research Ethics Committee of Peking University Cancer Hospital (Approval Number: 2019KT65) and the Chinese Center for Disease Control and Preventive Institutional Review Board (Approval Number: 201918) prior to implementation. Informed consent was obtained from each participant prior to the baseline survey.
: Not applicable.
: All authors declare that they have no competing interests.