RT Journal Article SR Electronic T1 Prevalence and predictors of work related respiratory symptoms in workers exposed to organic dusts. JF Occupational and Environmental Medicine JO Occup Environ Med FD BMJ Publishing Group Ltd SP 575 OP 575 DO 10.1136/oem.56.8.575 VO 56 IS 8 A1 D Fishwick A1 A Curran YR 1999 UL http://oem.bmj.com/content/56/8/575.abstract AB