RT Journal Article SR Electronic T1 Air pollution and life expectancy: is there a relation? JF Occupational and Environmental Medicine JO Occup Environ Med FD BMJ Publishing Group Ltd SP 781 OP 784 DO 10.1136/oem.54.11.781 VO 54 IS 11 A1 B Brunekreef YR 1997 UL http://oem.bmj.com/content/54/11/781.abstract AB