1. The epidemiology of ulcerative colitis and regional enteritis;Acheson,1965
2. An epidemiologic study of ulcerative colitis in Copenhagen County;Bonnevie;Scandinavian Journal of Gastroenterology,1968
3. Crohn’s disease in a defined population;Brahme;Gastroenterology,1975
4. The epidemiology of Crohn’s disease;Evans;Clinics in Gastroenterology,1972
5. An epidemiological study of ulcerative colitis and regional enteritis in the Oxford area;Evans;Gut,1975