Liu, Junzhong
Wang, Yuzhen
He, Guanghui
Wang, Xinhua
Sun, Minfeng
Article History
Received: 5 October 2021
Accepted: 1 February 2022
First Online: 6 February 2022
Declarations
:
: This study was conducted in accordance with the declaration of Helsinki. This study was approved by the Ethics Committee of Weifang No. 2 People's Hospital (The Second affiliated Hospital of Weifang Medical University). Because this was a retrospective study, informed consent was waived by the Ethics Committee of Weifang No. 2 People's Hospital (The Second affiliated Hospital of Weifang Medical University).
: We have obtained consent to publish from the participants (or legal parent or guardian) to report their individual patient data.
: The authors declare that they have no competing interests.