Wang, Ying
Cao, Mei
Zhu, Xi
Ni, Qiuying
Liu, Xinjie
Funding for this research was provided by:
Natural Science Foundation of Shandong Province (ZR2019MH131)
Article History
Received: 21 December 2021
Accepted: 15 March 2022
First Online: 7 April 2022
Declarations
:
: The study protocol was approved by the Ethics Committee of Shandong Qilu Hospital Ethics Committee (project number: KYLL-2017(KS)-621) and performed in compliance with the Helsinki declaration. Written informed consent was waived by the Ethics Committee of Shandong Qilu Hospital due to the retrospective nature and anonymous data collection.
: Authors have no conflict of interest to declare.