Media type: E-Article Title: Contribution of smoking and air pollution exposure in urban areas to social differences in respiratory health Contributor: Schikowski, Tamara; Sugiri, Dorothee; Reimann, Verena; Pesch, Beate; Ranft, Ulrich; Krämer, Ursula imprint: Springer Science and Business Media LLC, 2008 Published in: BMC Public Health Language: English DOI: 10.1186/1471-2458-8-179 ISSN: 1471-2458 Keywords: Public Health, Environmental and Occupational Health Origination: Footnote: Access State: Open Access