C Graph showing in vivo growth of the different cell line xenografts. Curves represent mean log-transformed luminescence ± SEM of individual glands; MCF7 (n=17), T47D (n=10), MM134 (n=12), and SUM44 (n=12). Statistical testing for interactions group cell growth/ time relative to MCF-7 was carried out by applying mixed-effect linear models. P-values are associated to likelihood-ratio test statistics of the ANOVA function in R. 