RT Journal Article SR Electronic T1 Decreases in air pollutants may lead to lower cardiopulmonary mortality JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 36 OP 36 DO 10.1136/thorax.58.1.36 VO 58 IS 1 A1 A Bhowmik YR 2003 UL http://thorax.bmj.com/content/58/1/36.abstract AB