Immunoadsorption Versus Immunoglobulins for Treatment of Chronic Inflammatory Demyelinating Polyneuropathy (CIDP)

Inclusion Criteria: * Diagnosis of possible, probable, or definite CIDP (typical or atypical) according to European Federation of Neurological Societies (EFNS) guidelines * Disease duration of 3 years or less * Age 18 years or above * Previous treatment with methyl-prednisolone and insufficient therapeutic response as judged by the treating physician, or contraindications against methyl-prednisolone, or clinically significant side effects under methyl-prednisolone therapy as judged by the treating physician Exclusion Criteria: * Clinical or laboratory evidence of manifest systemic infection, i.e., C-reactive protein (CRP) above 20 mg/l, or evidence of nitrite-positive urinary tract infection * Intake of angiotensin converting enzyme inhibitor within 1 week before first treatment * immunoglobulin A deficiency * Other contraindications against immunoadsorption or intravenous immunoglobulins