Funding for this research was provided by:
National Natural Science Foundation of China (81300432)
Natural Science Foundation of Beijing Municipality (7192066)
National Major Science and Technology Projects of China (2017ZX09304029)
Research on the application of clinical characteristics of the Beijing Municipal Science and Technology Commission (Z181100001718100)
Text and Data Mining valid from 2019-11-14
Received: 21 August 2019
Accepted: 1 November 2019
First Online: 14 November 2019
Ethics approval and consent to participate
: This research was approved by the Beijing Children’s Hospital Institutional Ethics Committee. Signed informed consent was obtained from the parents or guardians of each patient according to the Declaration of Helsinki.
: All authors had full access to all of the data in the study and had final responsibility for the decision to submit for publication.
: The authors declare that they have no competing interests.