Fig. 1. Linearity of quantification using 1:10 serial dilutions of the first WHO international standards for (A) cytomegalovirus (CMV) and (B) Epstein-Barr virus (EBV). Viral load results were obtained using the artus CMV QS-RGQ Kit and the artus EBV QS-RGQ kit in combination with the Rotor Gene Q thermal cycler. The “0” results (N=2 for CMV and N=1 for EBV) are not demonstrated in this figure because of the log transformation. Solid lines indicate the linear regression fit.