Funding for this research was provided by:
National Key Research and Development Program of China (2018YFC1002503)
CAMS Innovation Fund for Medical Science (2016-I2M-1-008)
The Special Fund of the Pediatric Medical Coordinated Development Center of Beijing Hospitals Authority (XTZD2018040)
Received: 2 October 2020
Accepted: 30 November 2020
First Online: 7 December 2020
Ethics approval and consent to participate
: The current study was approved by the Ethics Committee of Capital Institute of Pediatrics and Shandong Provincial Hospital Affiliated to Shandong First Medical University.
: Not applicable
: The authors declare that they have no competing interests.