Wang, Chen
Guo, Xuzhao
Zhu, Hua
Zou, Yan
Wu, Ming
Meng, Zhao
Article History
Received: 29 March 2023
Accepted: 24 November 2023
First Online: 11 December 2023
Declarations
:
: This study was approved by the ethics committee of the Children’s Hospital in Hebei Province (No. 2017010), and informed consent was obtained from all guardians of the patients included in this retrospective study. All the methods in the study were carried out in accordance with the ‘Declaration of Helsinki’ guidelines.
: Not applicable.
: The authors declare no competing interests.