title: Development of serum IgG subclass levels in children.
mesh_terms: D000293:Adolescent; D000367:Age Factors; D002648:Child; D002675:Child, Preschool; D005260:Female; D005312:Fetal Blood / Q000032:analysis*; D005865:Gestational Age; D006801:Humans; D007074:Immunoglobulin G / Q000032:analysis*; D007132:Immunoglobulin Isotypes / Q000032:analysis*; D007223:Infant; D011247:Pregnancy; D011863:Radioimmunoassay; D014427:Twins
chemical_list: D007074:Immunoglobulin G; D007132:Immunoglobulin Isotypes