Diagnostic yield of capsule endoscopy in ulcerative colitis and inflammatory bowel disease of unclassified type (IBDU) - Mehdizadeh, S; Chen, G; Enayati, P J; Cheng, D W; Han, N J; Shaye, O A; Ippoliti, A; Vasiliauskas, E A; Lo, S K; Papadakis, K A (Endoscopy, 2008)