TY - JOUR T1 - Occupational asthma: an approach to diagnosis and management JF - Canadian Medical Association Journal JO - CMAJ SP - 867 LP - 871 VL - 168 IS - 7 AU - Susan M. Tarlo AU - Gary M. Liss Y1 - 2003/04/01 UR - http://www.cmaj.ca/content/168/7/867.abstract ER -