8Decker GA, Loftus EV Jr, Pasha TM, et al. Crohn disease of the esophagus: clinical features and outcomes. Inflamm Bowel Dis, 2001,7(2) : 113-119.
9Wagtmans M J, Verspaget HW, Lamers CB, et al. Clinical aspects of Crohn's disease of the upper gastrointestinal tract: a comparison with distal Crohn's disease. AmJ Gastroenterol, 1997,92(9) : 1467-1471.
10Ghahremani GG, Gore RM, Breuer RI. Esophageal manifestations of Crohn's disease. Gastrointest Radiol, 1982,7(3) : 199-203.