Figure 1

Mortality and survival. (A) Percentage of deaths per group over total deaths. (B) Kaplan–Meier curves with the mean lifespan per group (h), from the beginning to the end of the experiment. Groups: A—negative control (− ve ctrl), B—sildenafil (S), C—l-arginine (l-arg), D—sildenafil and l-arginine (S + l-arg) and E—positive control (+ ve ctrl) (Kruskal–Wallis, p = 0.0293).