Wireless capsule endoscopy in the investigation of patients with chronic renal failure and obscure gastrointestinal bleeding (preliminary data) - Karagiannis, Stephanos; Goulas, Spyros; Galanis, Petros; Mavrogiannis, Christos; Kosmadakis, Georgios; Boletis, John; Arvanitis, Dimitrios; Evangelos Georgiou (World J Gastroenterol, 2006)