The overall reduction in intra-cohort variability of stain density by annotated anatomical structure. p value based on two-sided Wilcoxon rank sum test. Abbreviations for annotated regions are as follows: ‘PZ’ = Perinecrotic Zone, ‘PCnvN’ = Pseudopalisading Cells with no visible Necrosis, ‘N’ = Necrosis, ‘HB’ = Hyperplastic Blood, ‘MP’ = Microvascular Proliferation, ‘CT’ = Cellular Tumor, ‘IT’ = Infiltrating Tumor, ‘PCaN’ = Psuedopalisading Cells around Necrosis, ‘LE’ = Leading Edge