Funding for this research was provided by:
Natural Science Foundation of Guangdong Province (2017A030310189)
Received: 12 November 2018
Accepted: 18 August 2019
First Online: 30 August 2019
Ethics approval and consent to participate
: Written informed consent was obtained from all patients or from their parents if they were younger than 18 years old. This study was approved by the ethics committee of the First Affiliated Hospital of Sun Yat-Sen University.
: Written informed consent for publication was obtained from all participants. The patient shown in Fig. InternalRef removedsigned consent for his personal and clinical details along with identifying images to be published in this study.
: The authors declare that they have no competing interests.