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Correlation between the NTproCNP measured by RIA and by ELISA. Plasma samples from 40 healthy children were assayed for NTproCNP both by the in house RIA and the commercially available ELISA. Line, least mean squares linear regression line. A single data point was discarded as a statistical outlier. The correlation is significant (n=39, r=0.748, p<0.0005).
