IL17F and chronic inflammatory demyelinating polyradiculoneuropathy: We focused on SNPs with functional impacts located in cytokines of significance for helper T cell subsets relevant to the pathogenesis of CIDP and genotyped SNPs in genes for: IL-10 (rs1800871, rs1800896, and rs3024505), IL-6 (rs1800795), TNF (rs1800629 and rs361525), IL-12B (rs3212227 and rs6887695), IL-17F (rs11465553) and GM-CSF (rs25882).