Funding for this research was provided by:
Key Technology Research and Development Program of Shandong (2016YFC1300700)
National Natural Science Foundation of China (81701136, 81771264)
Received: 30 June 2020
Accepted: 17 September 2021
First Online: 5 October 2021
: The study protocol was approved by the Ethics Committee of Changhai Hospital. The requirement for written informed consent was waived given the retrospective nature of the analysis.
: Not applicable
: The authors declare that they have no competing interests.