According to the articles by Thorsson V et al32, we obtained the tumour classification information of these samples, including 172 cases of lumA, 59 cases of lumB, 26 cases of Her2, 61 cases of basal, 64 cases of normal, and 3 cases of unknown typing; and according to the articles of Cancer Genome Atlas Network33, we obtained 217 cases of positive ER status, 66 cases of negative status, 192 cases of positive PR status, 92 cases of negative status, 41 cases of positive Her2 and 233 cases of negative typing in these samples. Here, ERBB2 is linked to neoplasm.