| http://www.w3.org/ns/prov#value | - The transdermal drug delivery system of claim 18, wherein said steroid is an estrogen selected from the group consisting of colpormon, equilenin, estradiol benzoate, estradiol 17??-cypionate, moxestrol, mytatrienediol, quinestradiol, quinestrol, estropipate, 17??-estradiol, equilin, mestranol, estrone, estriol, ethinyl estradiol and diethylstilbestrol.
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