RT Journal Article SR Electronic T1 Flexible Sigmoidoscopy JF The Journal of the American Board of Family Practice JO J Am Board Fam Med FD American Board of Family Medicine SP 69 OP 69 DO 10.3122/jabfm.2.1.69a VO 2 IS 1 A1 Glinka, Steven J. YR 1989 UL http://www.jabfm.org/content/2/1/69.1.abstract AB