RT Journal Article SR Electronic T1 The biological effects of coarse and fine particulate matter JF Occupational and Environmental Medicine JO Occup Environ Med FD BMJ Publishing Group Ltd SP 313 OP 314 DO 10.1136/oem.60.5.313 VO 60 IS 5 A1 K Donaldson YR 2003 UL http://oem.bmj.com/content/60/5/313.abstract AB