1. [1] Yang H, Shohat, Rotter J. The genetics of inflammatory bowel disease. In: Mac Demott RP, Stenton WF, eds. Inflammatory bowel disease. New York, Elsevier 1992:17-51.
2. Psychiatric study of a consecutive series of 34 patients with ulcerative colitis;Feldman;British Med J,1967
3. Ulcerative Colitis and colorectal cancer: a population bases study;Ekbom;N Eng J Med,1990
4. [4] Greenstein AJ, Sachar DB, Pucillo A, et al. Cancer in universal and left sided ulcerative colitis: clinical and pathological features. Mt Senai J Med 1979;46(1):25- 32.
5. [5] Schwartz SI. Schwartz's principles of surgery. Vol. 2. 7th edn. McGraw-Hill 1998:1215-7.