1. Cancer risk in extensive ulcerative colitis;Kewenter;Ann Surg,1978
2. The prognosis of ulcerative colitis;Bonnevie;Scand J Gastroenterol,1974
3. Prospective study of out-patients with extensive colitis;Lennard-Jones;Lancet,1974
4. Cancer in colitis: Assessment of the individual risk by clinical and histological criteria;Lennard-Jones;Gastroenterology,1977
5. Rh Riddell, H. Goldman, Df Ransohoff, Hd Appelman, Cm Fenoglio, Rc Haggitt, C. Åhrén, P. Correa, Sr Hamilton, Bc Morson, Sc Summers, Jh Yardley, Dysplasia in inflammatory bowel disease: Standardized classification with provisional clinical implications, Human Pathol ((in press)).