7Eisner M D,Anthonisen N,Coultas D,et al.An official American Tho-racic Society Public Policy Statement:novel risk factors and the globalburden of chronic obstructive pulm onary disease[J].Am J RespirCrit Care Med,2010,182(5):693-718.
8Boehmer A L.Paediatric asthma:everything that seemed to be certainno longer is[J].Paediatr Respir Rev,2010,11(3):185-190.
