Article History
Received: 13 December 2020
Accepted: 20 July 2021
First Online: 7 October 2021
Declarations
:
: The study procedure was approved by the the Ethnic Committee of Chengdu University. Written informed consent was obtained from all participants before they took part in the study, and all participants were informed that they have the right not to participate in the study. All information obtained in the study was kept confidential.
: Not applicable.
: The authors declare that they have no competing interests.