RT Journal Article SR Electronic T1 Air pollution and mortality in a cohort of patients with chronic obstructive pulmonary disease: a time series analysis JF Journal of Epidemiology and Community Health JO J Epidemiol Community Health FD BMJ Publishing Group Ltd SP 73 OP 74 DO 10.1136/jech.54.1.73 VO 54 IS 1 A1 Garcia-Aymerich, Judith A1 Tobías, Aurelio A1 Antó, Josep Maria A1 Sunyer, Jordi YR 2000 UL http://jech.bmj.com/content/54/1/73.abstract AB