7MingLU,WanzhenYAO,NanshanZHONG,YuminZHOU,ChenWANG,PingCHEN,JianKANG,ShaoguangHUANG,BaoyuanCHEN,ChangzhengWANG,DiantaoNI,XiaopingWANG,DaliWANG,ShengmingLIU,JiachunLU,NingSHEN,PixinRAN.Chronic obstructive pulmonary disease in the absence of chronic bronchitis in China[J].Respirology.2010(7)