Evaluation of endoscopic variceal ligation (EVL) versus propanolol plus isosorbide mononitrate/nadolol (ISMN) in the prevention of variceal rebleeding: comparison of cirrhotic and noncirrhotic patients - Sarin, S K; Wadhawan, M; Gupta, R; Shahi, H (Dig Dis Sci, 2005)