With respect to other immune cell populations, Sanvito and colleagues found no differences among CIDP patients, healthy controls, and other neuropathy patients in total circulating B and T cells and in CD4+, CD8+ T cells, the ratio of CD4+/CD8+ T cells, regulatory T cell (Tregs), effector memory T cells, natural killer (NK) T cells, or central memory T cells [23]. This evidence concerns the gene CD4 and chronic inflammatory demyelinating polyradiculoneuropathy.