1Downs SH, Schindler C, Liu L J, et al. Reduced exposure to PM10 and attenuated, age- related decline in lung function[ J]. N Engl J Med, 2007,357 ( 23 ) : 2338- 2347.
3Bohadana A, Teculescu D, Martinet Y. Mechanisms of chronic airway obstruction in smokers [J]. Respir Med, 2004,98 ( 2 ) : 139-151.
4Reid C J, Gould S, Harris A. Developmental expression of mucin genes in the human respiratory tract[ J]. Am J Respir Cell Mol Biol, 1997,17 (5) :592-598.
5Bosse R, Sparrow D, Rose CL, et al. Longitudinal effect of age and smoking cessation on pulmonary function [ J ]. Am Rev Respir Dis,1981,123(4 Pt 1 ) :378-381.