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 Brode, Sarah K. A1 Ling, Simon C. A1 Chapman, Kenneth R. YR 2012 UL http://www.cmaj.ca/content/184/12/1365.abstract AB