D Box plot showing log10 (radiance fold change) of individual glands 5 months after injection of MCF7, T47D, MM134, and SUM44 cells; n=17, 14, 38, 47, respectively. Vertical Lines outside the box end at maximum and minimum values, upper and lower borders of the box represent lower and upper quartiles, and line inside the box identifies the median. Statistical significance of difference to MCF7 xenografts determined by unpaired, Student's t-test, two-tailed, ***p < 0.001, n.s. not significant. P-values have been corrected for multiple testing by FDR. 