Wu, Wenjuan
Li, Baoguang
Xie, Tao
Article History
Received: 20 September 2022
Accepted: 30 March 2023
First Online: 13 April 2023
Declarations
:
: This work has been carried out in accordance with the Declaration of Helsinki (2000) of the World Medical Association. This study was approved by the Ethics Committee of Hebei Children’s Hospital (152). The need for informed consent was waived by the Ethics Committee of Hebei Children’s Hospital, because of the retrospective nature of the study.
: Not applicable.
: The authors declare that they have no competing interests.