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 James K. Stoller A2 David L. Longworth YR 1993 UL http://www.ccjm.org/content/60/5/415.abstract AB