| http://www.w3.org/ns/prov#value | - A fourth embodiment of the present invention is a method for preparing a lyophilized lipid composition comprising dispersing the lipids dipalmitoylphosphatidylcholine, dipalmitoylphosphatidylethanolamine-polyethylene glycol, and dipalmitoylphosphatidic acid in a ratio of about 70 to about 90 mole % DPPC, about 5 to about 15 mole % DPPE-PEG, and about 5 to about 15 mole % DPPA, in an aqueous carrie
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