TY JOUR TI ESOPHAGEAL VARICEAL LIGATION IN THE PRIMARY AND SECONDARY PREVENTION OF VARICEAL BLEEDING KW portal hypertension KW ligation of varices JO Acta biomedica scientifica AU Dashatsyrenova, D.B. AU Gavrilova, A.K. AU Tverdokhlebov, P.O. PY 2018 IS 2 PB Scientific Center for Family Problems and Human Reproduction