1Vincent SD,Toelle BG,Aroni RA.et al,Exasperations of asthma:a qualitative study of patient language about worsening asthma[J].Med Aust.2006,184(1):451-454.
4WHO/NHLBI Workshop Report. Global initiative for asthma management and prevention. Maryland : National Institute of Health,National Heart, Lung, and Blood Institute,2005. ii.