Received: 27 March 2020
Accepted: 16 August 2020
First Online: 20 August 2020
Ethics approval and consent to participate
: A written consent was obtained from a patient or legal guardian on behalf of the participants under the age of 16. The Institutional Review Board of Nanfang Hospital affiliated to Southern Medical University approved the study.
: Not applicable.
: The authors declare that they have no competing interests.