Capsule endoscopy in the investigation of patients with portal hypertension and anemia - Goulas, Spyros; Triantafyllidou, Konstantina; Karagiannis, Stephanos; Nicolaou, Panayiota; Galanis, Petros; Vafiadis, Irene; Tzivras, Michael; Mavrogiannis, Christos (Canadian Journal of Gastroenterology and Hepatology, 2008)