NETest gene expression in matched tumor tissue:blood samples from malignant lung diseases. Linear regression (Pearson) analysis of log-transformed normalized values of each of the individual tumor-blood pairs identified R to range from 0.82 (BPC; n = 6, p < 0.0001) to 0.68 (SCLC; n = 4, p < 0.0001) to 0.25 (ACC; n = 5, p = 0.12) to 0.31 (SCC; n = 5, p = 0.06). In the graph plots, the pairs (blood-tissue) were averaged, and error bars indicate standard errors of the mean. The dashed line represents the best linear fit to each dataset.