Funding for this research was provided by:
National Natural Science Foundation of China (81170736, 81570715, 81870579)
Article History
Received: 4 November 2018
Accepted: 20 March 2019
First Online: 29 March 2019
Ethics approval and consent to participate
: The study was approved by the ethics committee of Peking Union Medical College Hospital, China. The reference number is B137, and the date of approval is 2015-6-29. Informed consent was provided by the parents.
: The parents provided written informed consent to use all family members’ personal, medical and clinical details for research and to publish the related scientific findings.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.