Fan, Lijun
Ren, Xiaoya
Song, Yanning
Su, Chang
Fu, Junfen
Gong, Chunxiu
Funding for this research was provided by:
The Pediatric Medical Coordinated Development Center of Beijing Hospitals Authority (XTYB201808)
The Public Health Project for Residents in Beijing (Z151100003915103)
The National Key Research and Development Program of China (2016YFC0901505)
Article History
Received: 4 August 2019
Accepted: 18 December 2019
First Online: 30 December 2019
Ethics approval and consent to participate
: The research protocol was approved by the ethics committee of Beijing Children’s Hospital, Capital Medical University (ID: 2012–28), and written informed consent was received from all patients or legal guardians.
: Consent was obtained from all patients for publication.
: The authors declare that they have no competing interests.