Received: 5 December 2019
Accepted: 17 February 2020
First Online: 22 February 2020
Ethics approval and consent to participate
: Due approval from the Institutional Research and Ethics Committee of Shanghai dermatology hospital was obtained for analysing the case study and writing the manuscript.
: Written informed consent was obtained from the parents of the patient described in this report. A copy of the written consent is available by request.
: The authors declare that they have no competing interests.