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Common variable immunodeficiency (CVID) is a heterogeneous group of disorders, characterized by severe reduction in serum IgG and IgA with normal or low number of B-cells. Interleukin (IL)-4 and IL-10 levels could be altered in CVID patients, while cytokine production could be affected with polymorphisms of gene promoter regions.The allele and genotype frequencies of IL-4 and IL-10 gene promoter polymorphic...
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