This database provided CREB3L1 mRNA expression levels for a large number of breast tumor tissues classified into breast cancer subtypes: luminal A (ER+, PR±, HER2-), luminal B (ER+, PR±, HER2+), HER2 and TNBC (ER-, PR-, HER2-) as well as normal breast tissue (Fig 1A; S1 Table). This evidence concerns the gene ERBB2 and breast cancer.