The composition includes {TAIL ~ liposomes} having an outer surface and {HEAD ~ 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 hydrophilic polymer chains on both the inner and outer surfaces of the liposomes 
The composition includes { TAIL ~ liposomes } having an outer surface and { HEAD ~ 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 hydrophilic polymer chains on both the inner and outer surfaces of the liposomes
OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH