title: Measuring seven endogenous ketolic estrogens simultaneously in human urine by high-performance liquid chromatography-mass spectrometry.
authors.affiliation: Laboratory of Proteomics and Analytical Technologies, SAIC-Frederick, Inc., National Cancer Institute at Frederick, Frederick, MD 21702, USA.
authors.forename: Xia
authors.initials: X
authors.lastname: Xu
authors.forename: Larry K
authors.initials: LK
authors.lastname: Keefer
authors.forename: David J
authors.initials: DJ
authors.lastname: Waterhouse
authors.forename: Joseph E
authors.initials: JE
authors.lastname: Saavedra
authors.forename: Timothy D
authors.initials: TD
authors.lastname: Veenstra
authors.forename: Regina G
authors.initials: RG
authors.lastname: Ziegler
mesh_terms: D000328:Adult; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D004967:Estrogens / Q000737:chemistry* / Q000652:urine*; D004986:Ether / Q000737:chemistry; D005260:Female; D006801:Humans; D006868:Hydrolysis; D006900:Hydroxylation; D007659:Ketones / Q000737:chemistry* / Q000378:metabolism; D008745:Methylation; D008875:Middle Aged; D015394:Molecular Structure; D017698:Postmenopause / Q000652:urine; D017697:Premenopause / Q000652:urine; D021241:Spectrometry, Mass, Electrospray Ionization / Q000379:methods*
chemical_list: D004967:Estrogens; D007659:Ketones; D004986:Ether