RT Journal Article SR Electronic T1 At what age should we discontinue colon cancer screening in the elderly? JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 269 OP 272 VO 74 IS 4 A1 Losey, Rachelle A1 Messinger-Rapport, Barbara J. YR 2007 UL http://www.ccjm.org/content/74/4/269.abstract AB