For extra experimentation with LOCATOR, we also provide computational analysis results for another immune cell type, the T-cytotoxic cells, with known (Dushyanthen et al. 2015, Stanton and Disis 2016, Li et al. 2021) prognostic and predictive value in specific breast cancer subgroups (HER2+ and Triple-negative). This evidence concerns the gene ERBB2 and breast cancer.