Esophageal capsule endoscopy in patients with suspected esophageal disease: double blinded comparison with esophagogastroduodenoscopy and assessment of interobserver variability - Delvaux, M; Papanikolaou, I S; Fassler, I; Pohl, H; Voderholzer, W; Rösch, T; Gay, G (Endoscopy, 2008)