NFASC and chronic inflammatory demyelinating polyradiculoneuropathy: Additionally, elevated CCL4/MIP-1β in the cerebrospinal fluid is a characteristic of IgG4 anti‐neurofascin 155-positive chronic inflammatory demyelinating polyneuropathy, which implies exacerbation of protein leakage, damage of encephalic and CCL4/MIP-1β decreases with combined immune-treatment response (40).