SOX9 and campomelic dysplasia: 46,XY, campomelic dysplasia cell line: 46, XY;CD-derived 6TF SLCs showed increased SOX9 expression (Fig. 5A; 8TF shown in Additional file 1: Fig. S5-3B,E); over the respective GFP control which was notably much smaller than that observed in control 46, XY-derived SLCs.