Funding for this research was provided by:
Dengfeng Scholar of China Medical University (1210618036)
Article History
Received: 6 January 2021
Accepted: 11 June 2021
First Online: 29 June 2021
Declarations
:
: The study protocol was approved by the Medical Ethics Committee of China Medical University (permit number CMU 6204-3008). And all participants gave written informed consent prior to the survey and examination.
: Not applicable.
: The authors declare that they have no competing interests.