The composition includes liposomes having an outer surface and an inner surface defining an aqueous liposome compartment, and being composed of a vesicle forming lipid and of a vesicle forming lipid derivatized with a hydrophilic polymer to form a coating of {HEAD ~ hydrophilic polymer chains} on {TAIL ~ both the inner and outer surfaces} of the liposomes 
The composition includes liposomes having an outer surface and an inner surface defining an aqueous liposome compartment , and being composed of a vesicle forming lipid and of a vesicle forming lipid derivatized with a hydrophilic polymer to form a coating of { HEAD ~ hydrophilic polymer chains } on { TAIL ~ both the inner and outer surfaces } of the liposomes
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