We confirmed the contribution of BM to endometriosis vascularization as previously reported.52 Specifically, although a small percentage of GFP+CD31+ cells engrafted endometriosis (0.6 ± 0.1%), the presence of these cells in murine endometriosis was significantly reduced after treatment with either AMD3100 (0.18 ± 0.04%) or CCX771 (0.3 ± 0.1%) (Figure 3D). The gene discussed is PECAM1; the disease is endometriosis.