Received: 17 May 2021
Accepted: 11 October 2021
First Online: 30 October 2021
: This study was conducted under the standard approved by the Ethics Committee of Hainan General Hospital, and conformed to the ethical principles for medical research involving humans of the World Medical Association Declaration of Helsinki. All participants signed informed consent forms before participating in this study.
: Not applicable.
: The authors declared that they have no conflicts of interest.