Liquid chromatography/tandem mass spectrometry method for the simultaneous determination of vardenafil and its major metabolite, N-desethylvardenafil, in human plasma: Application to a pharmacokinetic study (RCTC, BMRC)
J Chromatogr B Analyt Technol Biomed Life Sci. 877(1-2):95-100, 2009 Jan [
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