1. A. von Herbay, J. O. Gebbers and H. F. Otto,Immunopathology of ulcerative colitis: A review. Hepato-gastroenterology37, 99–107 (1990).
2. M. M. Aparicio-Pages, H. W. Verspaget, A. S. Pena, I. T. Weterman, P. A. de Bruin, M. A. Mierement-Ooms, J. M. van der Zon, E. A. van Tol and C. B. Lamers,In vitro cellular cytotoxicity in Crohn's disease and ulcerative colitis: Relation with disease activity and treatment, and the effect of recombinant gamma-interferon. J. Clin. Lab. Immunol.29, 119–124 (1989).
3. C. Fiocchi,Immune events associated with inflammatory bowel disease. Scand. J. Gastroenterol.25, 4–12 (1990).
4. G. P. Morris, P. L. Beck, M. S. Herridge, W. T. Depew, M. R. Szewczuk and J. L. Wallace,Hapten-induced model of chronic inflammation and ulceration in the rat colon. Gastroenterology96, 795–803 (1989).
5. A. Raedler and S. Schreiber,Immunology of ulcerative colitis. Hepato-gastroenterology36, 213–218 (1989).