title: IgG subclasses in selective IgA deficiency: importance of IgG2-IgA deficiency.
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D004406:Dysgammaglobulinemia / Q000276:immunology*; D006801:Humans; D017098:IgA Deficiency; D017099:IgG Deficiency; D007223:Infant