Arterioesophageal fistula secondary to rupture of an aberrant right subclavian artery aneurysm: a rare differential diagnosis in upper gastrointestinal bleeding - Lehmann, B; Clemetson, I; Fantin, A C; Henning, P; Kipfer, B; Mühlethaler, R; Vetsch, G; Dinkel, H -P (Endoscopy, 2006)