RT Journal Article SR Electronic T1 Perhaps it is time for a change in policy on lung cancer screening JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 438 OP 440 VO 74 IS 6 A1 Yankelevitz, David F. YR 2007 UL http://www.ccjm.org/content/74/6/438.abstract AB