Text and Data Mining valid from 2020-04-19
Received: 16 February 2019
Accepted: 6 April 2020
First Online: 19 April 2020
Ethics approval and consent to participate
: This study was approved by the ethics committees of West China Hospital of Sichuan University and adhered to the principles of the Declaration of Helsinki. Written informed consent was obtained from all individual participants and their parents (for patients under 16 years of age).
: Written informed consent for the publication of the case series and the accompanying images has been obtained from the patients, or their parents (for patients who were younger than 16 years).
: The authors declare that they have no competing interests.