Received: 27 January 2021
Accepted: 21 April 2021
First Online: 2 May 2021
: The study protocol was approved by the ethics committee of the Second Affiliated Hospital of Fujian Medical University (Quanzhou, China; approval number. 2019-207). Written informed consent was obtained from all participants or their guardians.
: Not applicable.
: The authors declare that there are no competing interests associated with the study.