3Lai CK,Beasley R,Crane J,et al.Global variation in the prevalence and severity of asthma symptoms:phase three of the international study of asthma and allergies in Childhood(ISAAC)[J].Thorax,2009,64(6):476-483.
5Takemura M,Niimi A,Matsumoto H,et al.Atopic features of cough variant asthma and classic asthma with wheezing[J].Clin Exp Allergy,2007,37(12):1833-1839.