Table 1. Distribution of tumors (%) from three different studies across five tumor subtypes
Data set Basal ERBB2 Luminal A Luminal B Normal breast-like No subtype
Norway/Stanford 17 10 24 10 3 36
van't Veer et al. 21 6 25 18 5 25
West et al. 37 4 39 14 0 6