Capsule Endoscopy in the investigation of renal transplant recipients with chronic diarrhea - Karagiannis, Stephanos; Goulas, Spyros; Kosmadakis, Georgios; Metaxaki, Polyxeni; Galanis, Petros; Kantianis, Alexandros; Boletis, John N; Mavrogiannis, Christos (Annals of Gastroenterology, 2007)