Live/dead assay of HUVECs and iPSC-MSCs co-cultured on CPC scaffolds. The images at 4, 7, 14, and 21 days are shown in (A–D). (E) The percentage of live cells. (F) The density of live cells (n = 5). CPC, calcium phosphate cement; HUVECs, human umbilical vein endothelial cells; iPSC-MSCs, induced pluripotent stem cell-derived mesenchymal stem cells.