4Dr. Alan G. Thorson M.D.,Mark A. Christensen M.D.,Steven J. Davis M.D.. The role of colonoscopy in the assessment of patients with colorectal cancer[J] 1986,Diseases of the Colon & Rectum(5):306~311
4Walter E. Longo M.D.,Garth H. Ballantyne M.D.,Anton J. Bilchik M.D.,Irvin M. Modlin M.D.. Advanced rectal cancer[J] 1988,Diseases of the Colon & Rectum(11):842~847
5Dr. Alan G. Thorson M.D.,Mark A. Christensen M.D.,Steven J. Davis M.D.. The role of colonoscopy in the assessment of patients with colorectal cancer[J] 1986,Diseases of the Colon & Rectum(5):306~311