RT Journal Article SR Electronic T1 Air pollution effects in the elderly: introduction JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP 1s OP 2s DO 10.1183/09031936.03.00000003 VO 21 IS 40 suppl A1 M. Decramer A1 R. Loddenkemper A1 J. Boe A1 J. Roca A1 M. Zelter YR 2003 UL http://erj.ersjournals.com/content/21/40_suppl/1s.abstract AB