4Kwon NH, Oh MJ, Min TH, et al. Causes and Clinical Features of Subaeute Cough[J].Chest, 2006,129: 1 142-1 147.
5Little SA, Chalmers GW, Maeleod K J, et al. Non-invasive markers of airway inflammation as predictors of oral steroid responsiveness in asthma [J].Thorax, 2000,55 : 232-234.
6Pizzichini E, Pizzichini MM, Leigh R, et al. Safety of sputum induction[J]. Eur Respir J, 2002,20(37) : 98- 188.
7Efthimiadis A, Spanevello A, Hamid Q, et al. Methods of sputum processing for cell counts, immunocytochemistry and in situ hybridisation[J].Eur Respir J, 2002,20(37) : 198-238.
8Pin I,Gibson PF,Kolendowicz K,et al.Induced sputum cell counts:a non-invasive method to investigate airway inflamm-ation in asthma.Thorax,1992,47:(1):25-29.
9Kidney JC,Wang AG,Efthimiadis A,et al.Elevated B cells in sputum of asthmatics:close correlation with eosinophils.Am J Respir Crit Care Med,1996,158:540-544.
10Fahy JV,Liu J,Wong H,et al.Cellular and biochemical analysis of induced sputum from asthmatic and from healthy subjects.Am Rev Respir Dis,1993,14:1126-1131.