Funding for this research was provided by:
National Natural Science Foundation of China (81671949)
Received: 24 May 2021
Accepted: 1 November 2021
First Online: 13 November 2021
: This study protocol conformed to the ethical guidelines of the 1975 Declaration of Helsinki and was approved by the ethics committee of each participating hospital.
: Informed consent was obtained from each patient included in the study.
: The authors declare that they have no conflicts of interest.