RT Journal Article SR Electronic T1 SELF-TEST: Early-onset emphysema JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 415 OP 416 VO 60 IS 5 A2 Stoller, James K. A2 Longworth, David L. YR 1993 UL http://www.ccjm.org/content/60/5/415.abstract AB