Retroperitoneal Perforation of a Duodenal Diverticulum with Colonic Necrosis - Report of a Case - Papalambros, E; Felekouras, E; Sigala, F; Kiriakopoulos, A; Giannopoulos, A; Aessopos, A; Bastounis, E; Mirilas, P; Hepp, W (Zentralblatt für Chirurgie, 2005)