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Correlation between the cytomegalovirus (CMV) DNA copy number and the number of pp65-antigen-positive cells in 156 real-time CMV DNA PCR-positives. Results from these tests are expressed as follows: pp65 assay as positive cells/200,000 examined white blood cells (WBCs); CMV DNA as log10 copies/mL (Pearson's correlation coefficient; n=156, r=0.5504, P<0.0001). The linear regression (solid line) with 95% confidence intervals (dotted line) is shown.
