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3. Aetiology of ulcerative colitis: a vascular hyothesis;Fairburn, R.A.;Lancet,1973
4. Thrombosis in inflammatory bowel disease;Koenigs, K.P.; McPhedran, P.; Spiro, H.M.;J Clin Gastoenterol,1987
5. Vascular complications of inflammatory bowel disease;Talbot, R.W.; Heppel, J.; Dozois, R.R.; Beart, R.W.