endothelial cell linereticulo endothelial cellsactivated endothelial cellsendothelial progenitor cellsmicrovascular endothelial cellsendothelial cells functioncirculating endothelial cellsepithelial and endothelial cellsfenestrated endothelial cellssinusoidal endothelial cellsvascular endothelial cellsendothelial cell culture