Fig. 2From: Estimation of tumour volume at therapy initiation by back-extrapolating the post-therapy regression curve of tumour volumeResiduals, i.e., the difference between the estimated (Vest) and the true values of tumour volume at time of therapy initiation (Vi) for regression models in Fig. 1. Residual sum of squares (RSS): Lin: 66; Exp: 4718; EXP: 6416Back to article page