"For example, the lipid composition is dissolved in an organic solvent, such as an alcohol, ether, halohydrocarbon or mixtures thereof, and the solvent is removed from the resulting solution, for example by rotary evaporation or freeze drying, and the resulting lipid film is hydrated by dispersing in an aqueous medium, such as phosphate-buffered saline or an aqueous solution of a sugar such as lact" . . . .