Received: 17 November 2020
Accepted: 5 January 2021
First Online: 5 February 2021
Ethics approval and consent to participate
: This study was approved by the ethics committee of West China Hospital of Sichuan University and informed consent was obtained from the patients and their parents.
: The patients and their parents gave written consent for publication of their clinical details and clinical images. A copy of the written consent is available for review by the editor of this journal.
: The authors declare that they have no competing interests.