Received: 6 August 2020
Accepted: 4 November 2020
First Online: 19 November 2020
Ethics approval and consent to participate
: This study was approved by the Ethics Committee for Clinical Research of the First Affiliated Hospital of Wenzhou Medical University (No. 2020–065), and consent to participate was obtained from the parents/guardians of the minors included in this study.
: All authors informed consent for publication.
: The authors have no conflicts of interest to disclose.