In one aspect, the invention includes a composition for treating {HEAD ~ a tumor} in {TAIL ~ a subject}, comprising liposomes composed of a vesicle forming lipid and between about 1 20 mole percent of a vesicle forming lipid derivatized with a hydrophilic polymer 
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In one aspect , the invention includes a composition for treating { HEAD ~ a tumor } in { TAIL ~ a subject } , comprising liposomes composed of a vesicle forming lipid and between about 1 20 mole percent of a vesicle forming lipid derivatized with a hydrophilic polymer
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH