RT Journal Article SR Electronic T1 Alpha-1 antitrypsin deficiency: a commonly overlooked cause of lung disease JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 1365 OP 1371 DO 10.1503/cmaj.111749 VO 184 IS 12 A1 Sarah K. Brode A1 Simon C. Ling A1 Kenneth R. Chapman YR 2012 UL http://www.cmaj.ca/content/184/12/1365.abstract AB