Lyu, Yanyu
Wang, Guiyun
Sun, Zhenfeng
Cui, Xiaodai
Xiu, Qingyong
Wu, Lijun http://orcid.org/0000-0001-5876-8379
Funding for this research was provided by:
This study was supported by the Directional Guidance Fund of Capital Institute of Pediatrics (grant no. FX-15-04).
Article History
Received: 14 July 2022
Revised: 25 November 2022
Accepted: 1 December 2022
First Online: 9 December 2022
Ethics statement
: Written informed consent was obtained from the participants in the study, and the study was approved by the ethics committees of the Capital Institute of Pediatrics (8 November 2016; Approval no. SHERLL-2016034).
: The authors declare no competing interests.