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MAG and HMGCR antibodies in IVIg preparations. (A) Column graph of anti-MAG ELISA. There was a statistically significant difference between the mean value of the 16 IVIg preparations and the mean value of 16 MAG IgG-seronegative controls (p = 0.0002; 99% confidence interval, 0.08136–0.3446) (dilution, 1:1000). (B) Column graph of HMGCR ELISA tests. Only 2 of the 16 IVIg samples were low-positive (dilution, 1:101; 20,867 SGU and 21,465 SGU; assay cutoff, positive ≥ 20 SGU)
