title: Determination of (13)C/(12)C ratios of endogenous urinary steroids excreted as sulpho conjugates.
authors.affiliation: German Sport University Cologne, Institute of Biochemistry, Am Sportpark Müngersdorf 6, 50933 Cologne, Germany. t.piper@biochem.dshs-koeln.de
authors.forename: Thomas
authors.initials: T
authors.lastname: Piper
authors.forename: Georg
authors.initials: G
authors.lastname: Opfermann
authors.forename: Mario
authors.initials: M
authors.lastname: Thevis
authors.forename: Wilhelm
authors.initials: W
authors.lastname: Schänzer