Natarajan Y, White DL, El-Serag HB, Ramsey D, Richardson P, Kuzniarek J, Shukla R, Tansel A, Kanwal F. Role of Non-hepatic Medical Comorbidity and Functional Limitations in Predicting Mortality in Patients with HCV. Dig Dis Sci. 2017 01; 62(1):76-83.