RT Journal Article SR Electronic T1 Do socioeconomic conditions reflect a high exposure to air pollution or more sensitive health conditions? JF Journal of Epidemiology and Community Health JO J Epidemiol Community Health FD BMJ Publishing Group Ltd SP 802 OP 802 VO 58 IS 9 A1 Laurent Filleul A1 Imed Harrabi YR 2004 UL http://jech.bmj.com/content/58/9/802.2.abstract AB