High performance liquid chromatography/ion-trap mass spectrometry for separation and simultaneous determination of ethynylestradiol, gestodene, levonorgestrel, cyproterone acetate and desogestrel
2007 ◽
Vol 588
(2)
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pp. 304-315
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2012 ◽
Vol 405
(4)
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pp. 1257-1266
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1999 ◽
Vol 20
(14)
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pp. 2930-2937
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2007 ◽
Vol 1172
(2)
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pp. 121-126
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2003 ◽
Vol 17
(13)
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pp. 1455-1461
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2007 ◽
Vol 21
(9)
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pp. 1497-1503
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