Fig. 1

Kaplan-Meier survival curve. We found a significant difference in survival between the sildenafil group, sildenafil + L-NAME group and the saline group (P < 0.001 by logrank test)
Kaplan-Meier survival curve. We found a significant difference in survival between the sildenafil group, sildenafil + L-NAME group and the saline group (P < 0.001 by logrank test)