Received: 28 September 2020
Accepted: 30 December 2020
First Online: 9 January 2021
Ethics approval and consent to participate
: The present study was approved by the institutional review board of The Affiliated Hospital of Southwest Medical University, and signed informed consent for participation was obtained from all study patients. Parents provided written consent for the inclusion of the patients in this study, since some of the patients were minors (age less than 18) at the time of participation in the study.
: Not applicable.
: The authors declare that they have no competing interests.