Barrett’s Esophagus: a Discrepancy between Macroscopic and Histological Diagnosis - Endlicher, E; Rümmele, P; Beer, S; Knüchel, R; Rath, H; Schlottmann, K; Grossmann, J; Woenckhaus, U; Schölmerich, J; Messmann, H (Endoscopy, 2005)