RT Journal Article SR Electronic T1 Environmental Hazards and Human Health JF Occupational and Environmental Medicine JO Occup Environ Med FD BMJ Publishing Group Ltd SP 144 OP 144 DO 10.1136/oem.54.2.144 VO 54 IS 2 A1 Paul Harrison YR 1997 UL http://oem.bmj.com/content/54/2/144.1.abstract AB