Funding for this research was provided by:
Natural Science Foundation of Beijing Municipality (7194249)
Capital’s Funds for Health Improvement and Research (2018-2-2053)
Priming Scientific Research Foundation for the Junior Researcher in Beijing Tongren Hospital, Capital Medical University (2017-YJJ-ZZL-008, 2018-YJJ-ZZL-024)
Text and Data Mining valid from 2019-07-31
Received: 13 August 2018
Accepted: 22 July 2019
First Online: 31 July 2019
Ethics approval and consent to participate
: The study adheres to the tenets of the Declaration of Helsinki for research involving human subjects and was approved by the ethics committee of Beijing Tongren Hospital.
: Written informed consent from patients or their parents was obtained for publication of potentially identifying details as well as the images in this case series.
: The authors declare that they have no competing interests.