1. National cooperative Crohn's disease study: extraintestinal manifestations and perianal complications;Rankin, G.B.; Watts, D.; Melnyk, C.S.; Kelley, M.L.;Gastroenterology,1979
2. The epidemiologic and demographic characteristics of inflammatory bowel disease: an analysis of a computerized file of 1400 patients;Rodgers, B.H.G.; Clark, L.M.; Kirsner, J.B.;J Chron Dis,1971
3. Chronic bronchial suppuration and inflammatory bowel disease;Butland, R.J.A.; Cole, P.; Citron, K.M.; Turner-Warwick, M.;Q J Med,1981
4. Bronchial disease in ulcerative colitis;Higenbotam, T.; Cochrane, G.M.; Clark, T.J.M.; Turner, D.; Millis, R.; Seymour, W.;Thorax,1980
5. Unexplained broncho-pulmonary disease with inflammatory bowel disease;Kraft, S.C.; Earle, R.H.; Roesler, M.; Esterly, JR;Arch Intern Med,1976