Funding for this research was provided by:
National Natural Science Foundation of China (81460169)
Received: 1 September 2020
Accepted: 3 December 2020
First Online: 14 December 2020
Ethics approval and consent to participate
: All procedures of the investigation were carried out following the rules of the Declaration of Helsinki of 1975 (ExternalRef removed), revised in 2008. The study design was approved by the Ethics Committee of the First Affiliated Hospital, Guangxi Medical University (No. Lunshen-2014-KY-Guoji-001, Mar. 7, 2014). Written informed consent was obtained from all participants.
: Not applicable.
: The authors declare that they have no competing interests.