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The level of IgG4, IgA, and IgE against A.f in different groups. ABPA, allergic bronchopulmonary aspergillosis; A.f (+) asthma, Aspergillus fumigatus-sensitized asthma; m3, crude extract of A.f; Asp f1, Asp f3, and Asp f9, components of A.f; ns, no significance; *p<0.05; **p<0.01.
