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Poynard T, Cales P, Pasta L, Ideo G, Pascal JP, Pagliaro L, Lebrec D. Franco-Italian Multicenter Study Group
Beta-adrenergic-antagonist drugs in the prevention of gastrointestinal bleeding in patients with cirrhosis and esophageal varices. An analysis of data and prognostic factors in 589 patients from four randomized clinical trials
N Engl J Med. 1991 May 30;324(22):1532-8