ERBB2 and neoplasm: To validate our findings on the 36 cases of the 4 main subtypes (9 for each PAM50 type) in the OSLO2 landscape cohort, by applying consensus clustering using the 775 proteins that overlap with the 1054 mostly highly variant proteins of our 08–13 cohort, highly resembled four of the main consensus core tumor clusters (CoTCs) and their biological functions as reported in Johansson et al. These clusters consisted of CoTC1 (basal-like immune cold), CoTC2 (basal-like immune hot), CoTC3 with few CoTC6 cases (luminal A-enriched) and CoTC6 (luminal B and Her2-Enriched).