PROS1 and hereditary thrombophilia due to congenital protein S deficiency: The 1 year, 3 year and 5 year survival after transplantation for the patients with PVT were 90.3%, 71.0%, and 61.8%, compared with 86.1%, 76.2%, and 74.2% for the patients without PVT (Figure 1, p = 0.956).To assess the impact of protein S deficiency on survival, survival rates were analyzed for the patients with or without protein S deficiency in cirrhotic patients who were waiting for liver transplantation.