Correlations between complement fixing antibody isotypes and C1rs-C1inh- activation product of the classical pathway in NP tissue. A, Correlation between IgM and C1rs-C1inh. B, Correlation between IgG3 and C1rs-C1inh. C, Correlation between IgG1 and C1rs-C1inh. D, Correlation between IgG2 and C1rs-C1inh. E, Correlation between IgG4 and C1rs-C1inh. F, Correlation between total immunoglobulin and C1rs-C1inh. (Spearman’s coefficient)