Article History
Received: 10 November 2020
Accepted: 2 January 2021
First Online: 20 January 2021
Ethics approval and consent to participate
: The study was approved by the Ethics Committee of Hainan People’s Hospital, and complied with the Declaration of Helsinki. Informed consent was given by all the subjects.
: All authors declare that they consent for publication.
: All authors declare that they have no competing interests.