Funding for this research was provided by:
National Natural Science Foundation of China (81570928)
Received: 18 February 2021
Accepted: 10 October 2021
First Online: 20 December 2021
: The present study was approved by the Medical Ethics Committee of the Second Xiangya Hospital (certificate number: S452). Informed consent of all participants was obtained prior to interview.
: No conflicts of interest to be declared.