RT Journal Article SR Electronic T1 Personal exposure assessment in the epidemiology of air pollutants JF Occupational and Environmental Medicine JO Occup Environ Med FD BMJ Publishing Group Ltd SP 458 OP 459 DO 10.1136/oem.60.6.458-a VO 60 IS 6 A1 R M Harrison A1 R P Kinnersley A1 R G Lawrence A1 J G Ayres A1 D Mark YR 2003 UL http://oem.bmj.com/content/60/6/458.2.abstract AB