Full-text assessment was performed for the remaining 18 articles, of which 7 were excluded for the following reasons: 2 articles could not be retrieved despite attempts to access the full text, 3 did not focus on breast cancer (e.g., studies on cervical cancer [19], atherosclerosis [20] or cholangiocarcinoma [21]), and 2 did not directly evaluate ERO1α in the context of breast cancer progression (e.g., a docking study of inhibitors [22] or macrophage-induced invasion of breast epithelial cells without direct analysis of breast tumors [23]). This evidence concerns the gene ERO1A and cholangiocarcinoma.