Funding for this research was provided by:
National Natural Science Foundation of China (31800153)
Natural Science Foundation of Beijing Municipality (7164241)
CAMS Central Public Welfare Scientific Research Institute Basal Research Expenses (2016ZX310182-3)
CAMS Initiative for Innovative Medicine (CAMS-I2M)
Text and Data Mining valid from 2019-10-04
Received: 22 April 2019
Accepted: 21 September 2019
First Online: 4 October 2019
Ethics approval and consent to participate
: All procedures associated with the study were approved by the Review Board of Capital Institute of Pediatrics.
: Not applicable.
: The authors declare that they have no competing interests.