Blood decay and liver uptake of ⁵¹Cr vesicles after preinjection of PC and PS liposomes (2 experiments). Left, blood decay after preinjection of PC liposomes (□) and PS liposomes (▿). Right, liver uptake after preinjection of PC liposomes (▪) and PS liposomes (▾). ^*Significantly different (.01 < P < .05) from controls. ^**Significantly different (P < .01) from controls.