Peng, Hongfa
Liu, Wencan
Jiang, Jingjing
Du, Hui
Article History
Received: 20 April 2023
Accepted: 24 July 2023
First Online: 28 August 2023
Declarations
:
: The retrospective study protocol was approved by the Institutional Review Board of the Second Hospital of Hebei Medical University, and the board waived the requirement for for patient informed consent. This study conforms to the provisions of the Declaration of Helsinki (as revised in Tokyo 2004).
: Not applicable.
: The authors declare no competing interests.