3Schepis F,Camma C,Niceforo D,et al.Which patients with cirrhosis should Undergo endoscopic screening for esophagealvarices detection[J].Hepatology,2001,33(2):333-338.
4Gurubacharya DL,Mathurak C,Karki DB.Correlation between serum-ascites albumin concentration gradient and endoscopic parameters of portal hypertension[J].Kathmandu Univ Med J,2005,3(4):327-333.
5Pilette C,Oberti F,Aube C,et al.Non-in vasive diagnosis of esophageal varices in chronic liver diseases[J].J Hepatol,1999,31:867-873.