ERRATUM

Standardized determination of real-time PCR efficiency from a single reaction set-up. Tichopad Ales, Dilger Michael, Schwarz Gerhard, Pfaffl Michael W. Nucleic Acids Res. 2003;31:e122–e122. doi: 10.1093/nar/gng122.

The publishers would like to apologise for Figure 1 being incomplete. The complete and correct figure appears below.

Figure 1.

Flowchart of the statistical estimation of the beginning of the exponential phase based on inspection of externally studentized residuals.