Efficacy of endoscopic sclerotherapy on long-term management of oesophageal varices: a comparative study of results in patients with cirrhosis of the liver, non-cirrhotic portal fibrosis (NCPF) and extrahepatic portal venous obstruction (EHO) - Bhargava,D.K.; Dasarathy,S.; Sundaram,K.R. (J Gastroenterol Hepatol, 1991)