1Jaen DJI,de Castro MC,Gontan G,et al.Prevalence of chronic obstructive pulmonary disease and risk factor in smokers and ex-smokers.Arch Bronconeumol,2003,39:554-558.
2Patel IS,Seemungal TAR,Wilks M,et al.Relationship between bacterial colonisation and the frequency,character,and severity of COPD exacerbations.Thorax,2002,57:759-764.
3Hill AT,Campbell EJ,Hill SL,et al.Association between Airway Bacterial Load and Markers of Airway Inflammation in Patients with Stable Chronic Bronchitis.Am J Med,2000,109:288-295.
4Murphy TF,Brauer AL,Schiffmacher AT,et al.Persistent colonization by haemophilus influenzae in Chronic Obstructive Pulmonary Disease.Am J Respir Crit Care Med,2004,170:266-272.
5Lieberman D,Ben Y,Mboldur I,et al.Serological evidence of Mycoplasma pneumoniae infection in acute exacerbation of COPD.Diagn Microbiol Infect Dis,2002,44:1-6.
6Lieberman D,Ben-Yaakov M,Lazarovich Z,et al.Chlamydia pneumoniae infection in acute exacerbations of chronic obstructive pulmonary disease: analysis of 250 hospitalizations.Eur J Clin Microbiol Infect Dis,2001,20:698-704.
7Hertzen L,Alakarppa H,Koskinen R,et al.Chlamydia pneumoniae infection in patients with chronic obstructive pulmonary disease.Epidemiol Infect,1997,118:155-164.
8Rohde G,Wiethege A,Borg I,et al.Respiratory viruses in exacerbations of chronic obstructive pulmonary disease requiring hospitalisation: a case-control study.Thorax,2003,58:37-42.
9Seemungal T,Harper-Owen R,Bhowmi K,et al.Respiratory viruses,symptoms,and inflammatory markers in acute exacerbations and stable chronic obstructive pulmonary disease.Am J Respir Crit Care Med,2001,164:1618-1623.
10Qvarfordt I,Riise GC,Andersson BA,et al.Lower airway bacterial colonization in asymptomatic smokers and smokers with chronic bronchitis and recurrent exacerbations.Respir Med,2000,94:881-887.
