| http://www.w3.org/ns/prov#value | - FIG. 7 is a graph which shows the difference in the skin permeation profile of levonorgestrel vs. the thickness of a permeation-regulating (ethylene/vinyl acetate) copolymer membrane in a dosage unit of the type shown in FIGS. 1 and 2 as compared with the permeation rate wherein no membrane is in contact with the skin.
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