Fig. 1

Kaplane–Meier survival curve showing postoperative survival rate. The mean survival period was 343 days, and the survival rate at 6 months and 1 year postoperative was 73.1% and 56.3%, respectively.

Kaplane–Meier survival curve showing postoperative survival rate. The mean survival period was 343 days, and the survival rate at 6 months and 1 year postoperative was 73.1% and 56.3%, respectively.