Tringler B, Zhuo S, Pilkington G, Torkko KC, Singh M, Lucia MS, Heinz DE, Papkoff J, Shroyer KR. B7-h4 is highly expressed in ductal and lobular breast cancer. Clin Cancer Res. 2005 Mar 01;11(5):1842–8. doi: 10.1158/1078-0432.ccr-04-1658. PMID: 15756008.