Xu, Dan
Chen, Ye-Shi
Feng, Chen-Hui
Cao, Ai-Mei
Li, Xiao-Hui
Article History
Received: 6 July 2023
Revised: 22 October 2023
Accepted: 11 November 2023
First Online: 1 December 2023
Competing interests
: The authors declare no competing interests.
: The study protocol was reviewed and approved by the Institutional Review Board of Capital Institute of Pediatrics (Ref. No. SHERLL2023048).
: The requirement to obtain informed written consent was waived owing to the nature of retrospective studies.