Peripapillary Duodenal Varices as a Rare Cause of Severe Bleeding in a Patient with No Other Signs of Portal Hypertension – Successful Endoscopic Treatment with Cyanoacrylate Injection - Weismüller, T. J.; Schweitzer, N.; Boozari, B.; Negm, A.; Bürger, D.; Manns, M. P.; Wedemeyer, J.; Kubicka, S. (Zeitschrift für Gastroenterologie, 2011)