Funding for this research was provided by:
National Natural Science Foundation of China (81970203)
Chongqing Municipal Health Commission (cstc2021jcyj-msxmX0028)
Received: 6 December 2021
Accepted: 12 April 2022
First Online: 26 April 2022
: We observed the Declaration of Helsinki guidelines. All study procedures were approved by the ethics committee of the first affiliated hospital of Chongqing medical university (approval number 2020-607). The written informed consent was not signed, but the patients were informed orally. This study was an observational study and no harm was caused to the patients included. The data used in the study is anonymous.
: All authors approved the current version and agreed to the BMC Cardiovascular Disorders submission policies. The manuscript has not been published and is not being considered for publication elsewhere in whole or part in any language.
: The authors declare that they have no competing interests.