Received: 11 October 2020
Accepted: 27 January 2021
First Online: 5 February 2021
Ethics approval and consent to participate
: This study was approved by the ethics committee of Hong Hui hospital, Xi’an Jiaotong University. All parents or guardians of the minors provided written informed consent prior to participation in the study.
: Not applicable, as no identifying personal information is included in this manuscript. All patients or guardians of these children signed the informed consent before surgery and provided the consent to publish and report individual clinical data.
: The authors declare that they have no competing interests.