Limitations
This study was not only a single-center study but also of a
retrospective nature with consecutive patients, which may have resulted
in patient selection bias; thus, the conclusions need to be further
verified by multicenter studies. The number of cases in the nonsurvivor
group was small, so the sample size should be further expanded.
Generally, it is a weakness that not all important details that might
have influenced the patients’ outcomes can be collected.