COL1A1 and breast cancer: Our previous analysis of open databases showed that ITGA11 expression was correlated positively with PDGFRB, ACTA2, TNC, COL1A1, and COL1A3 in human breast cancer, and the immunostainings showed that α11, PDGFRβ, and TNC were colocalized to CAF subsets in human breast cancer stroma (16).