Orthograde whole gut irrigation with mannite versus paromomycine + lactulose as prophylaxis of hepatic encephalopathy in patients with cirrhosis and upper gastrointestinal bleeding: results of a controlled randomized trial. - Tromm,A.; Griga,T.; Greving,I.; Hilden,H.; Huppe,D.; Schwegler,U.; Micklefield,G.H.; May,B. (Hepatogastroenterology, 2000)