Funding for this research was provided by:
National Natural Science Foundation of China (81570847)
Hunan Provincial Science and Technology Department (No.2015TP2007)
Received: 18 October 2018
Accepted: 27 June 2019
First Online: 16 July 2019
Ethics approval and consent to participate
: Not applicable.
: Written informed consent for publication of the clinical details and accompanying images was obtained from the guardian of the patient. A copy of the consent form is available for review by the editor of this journal.
: The authors declare that they have no competing interests.