RT Journal Article SR Electronic T1 Ask the Expert: Clinical dilemmas in asthma JF Breathe JO breathe FD European Respiratory Society SP 346 OP 351 DO 10.1183/18106838.0504.346 VO 5 IS 4 A1 M. Gaga YR 2009 UL http://breathe.ersjournals.com/content/5/4/346.abstract AB