Funding for this research was provided by:
National Natural Science Foundation of China (81772299, 81822030)
Key Technologies Research and Development Program (2018YFC0910500)
Natural Science Foundation of Beijing Municipality (7191007)
CAMS Initiative Fund for Medical Sciences (2016-I2M-3-003, 2017-I2M-2-001)
Received: 2 February 2020
Accepted: 30 April 2020
First Online: 27 May 2020
Ethics approval and consent to participate
: The study was approved by the Ethical Review Board of the Peking Union Medical College Hospital (2012/03/14, JS-908). Written informed consent was provided by each participant. When the individuals younger than the age of 16, the written informed consent is obtained from their parents or legal guardians.
: Written informed consent for publication of clinical details and/or clinical images was obtained from the all the participants. When the individuals younger than the age of 18, the written informed consent is obtained from their parents or legal guardians.
: The authors declare that they have no competing interests.