RT Journal Article SR Electronic T1 Early Diagnosis of Diseases of the Colon and Rectum JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 94 OP 102 VO 7 IS 2 A1 Collins, E. N. YR 1940 UL http://www.ccjm.org/content/7/2/94.abstract AB