https://www.cochrane.org/fr/CD011803/LIVER_ligature-elastiques-contre-sclerotherapie-dans-la-prophylaxie-primaire-des-varices-oesophagiennes 2020 France United Kingdom review of literature french abstract principal esophageal varices ligation child child, nos sclerotherapy ligation of esophageal varices Child prophylactic treatment, nos Child Child Child Esophageal varices esophageal and gastric varices