RT Journal Article SR Electronic T1 Work related asthma JF Occupational and Environmental Medicine JO Occup Environ Med FD BMJ Publishing Group Ltd SP 503 OP 504 DO 10.1136/oem.59.8.503 VO 59 IS 8 A1 Liss, G M A1 Tarlo, S M YR 2002 UL http://oem.bmj.com/content/59/8/503.abstract AB