Li, Chunzhen
Han, Yanan
Zhang, Lili
Chen, Zhiguo
Jin, Mei
Sun, Suzhen
Article History
Received: 9 June 2022
Accepted: 16 August 2022
First Online: 26 August 2022
Declarations
:
: This study is approved by the Medical Research Ethics Committee of Children’s Hospital of Hebei Province affiliated with Hebei Medical University (Approval #202136), in compliance with the principles of the Declaration of Helsinki, the Code of Ethics of the World Medical Association. All methods were carried out in accordance with relevant guidelines and regulations. The Ethics Committee of Children’s Hospital of Hebei Province waived the need for informed consent due to retrospective study.
: Not applicable as all data presented in the article are de-identified.
: All authors have no competing interests.