PTK7 and breast cancer: TNBC (n = 572) and non-TNBC breast cancer (n = 6,739) DNA microarray data were selected from Breast Cancer Gene-Expression Miner v4.3 system (http://bcgenex.centregauducheau.fr/BC-GEM/) and PTK7 expressions were higher in TNBC than that in non-TNBC (Supplementary Figure S1A).