TY - JOUR AU - May, A; Gunter, E; Roth, F TI - Accuracy of staging in early oesophageal cancer using high resolution endoscopy and high resolution endosonography: a comparative, prospective, and blinded trial JO - Gut VL - 53 PY - 2004 DO - 10.1136/gut.2003.029421 SP - 634 EP - 640 N1 - et al. ER -