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