Evaluation of four time-saving methods of reading capsule endoscopy videos - Kyriakos, Nikolaos; Karagiannis, Stefanos; Galanis, Petros; Liatsos, Christos; Zouboulis-Vafiadis, Irini; Evangelos Georgiou; Mavrogiannis, Christos (European journal of gastroenterology & hepatology, 2012)