Received: 23 April 2020
Accepted: 19 May 2020
First Online: 3 June 2020
Ethics approval and consent to participate
: The study was conducted in accordance with the Declaration of Helsinki and the Ethics Committee of Peking University First Hospital (PKUFH-2019-181). Written informed consents were obtained from all of the participants of this family in the study. The written informed consent of the boy aged 11 years in our study was obtained from his parents.
: Written informed consent was obtained from all of the participants in the study to publish the clinical details and images on the internet. The written informed consent to publish of the boy aged 11 years in our study was obtained from his parents.
: The authors have no conflict of interests.