RT Journal Article SR Electronic T1 “EXCESS MORTALITY IN PATIENTS WITH ASTHMA ON LONG-ACTING β2-AGONISTS” J. HASFORD AND J.C. VIRCHOW. EUR RESPIR J 2006; 28: 900–902. JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP 823 OP 823 DO 10.1183/09031936.50085606 VO 29 IS 4 YR 2007 UL http://erj.ersjournals.com/content/29/4/823.1.abstract AB