Kaplan-Meier Survival Curve. Mice were subjected to 90 minutes of liver ischemia followed by a 3-week period of reperfusion. The plot shows two curves. The solid line represents the survival curve for the P/I null mice (10/10 mice survived) and the broken line represents the survival curve for the wild-type mice (7/10 mice survived). Wild-type survival was not significantly different from P/I null survival (p = 0.067) although a trend is apparent.