Funding for this research was provided by:
Hebei Province Medical Science Special Major Projects Research Fund (Hebei Province Medical Science Special Major Projects Research Fund)
Received: 12 August 2019
Accepted: 27 November 2019
First Online: 10 December 2019
Ethics approval and consent to participate
: This study was approved by the Institutional Review Board of Third Hospital of Hebei Medical University and received written consent from all the study participants.
: Written informed consent was obtained from each patients’ parents for the publication of this report and the accompanying images.
: The authors declare that they have no competing interests