Received: 9 July 2020
Accepted: 6 December 2020
First Online: 23 January 2021
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: The Ethics Committee in Xiangya Hospital of Central South University approved the study. All methods were performed in accordance with the relevant guidelines and regulations. Written informed consent was acquired from each of the patients (or their parents and legal guardians) to authorize treatment, imageology findings, and photographic documentation. The patients (or their parents and legal guardians) consented to the publication of their pictures as well as their anonymous and clustered data.