title: Precisely wrong? Urinary fractionated metanephrines and peer-based laboratory proficiency testing.
authors.forename: Ravinder J
authors.initials: RJ
authors.lastname: Singh
authors.forename: Stefan K
authors.initials: SK
authors.lastname: Grebe
authors.forename: Bingfang
authors.initials: B
authors.lastname: Yue
authors.forename: Alan L
authors.initials: AL
authors.lastname: Rockwood
authors.forename: John C
authors.initials: JC
authors.lastname: Cramer
authors.forename: Zoltan
authors.initials: Z
authors.lastname: Gombos
authors.forename: Graeme
authors.initials: G
authors.lastname: Eisenhofer
mesh_terms: D002138:Calibration; D002849:Chromatography, Gas; D002853:Chromatography, Liquid / Q000379:methods; D006801:Humans; D007753:Laboratories / Q000592:standards*; D013058:Mass Spectrometry / Q000379:methods; D008676:Metanephrine / Q000592:standards / Q000652:urine*; D009647:Normetanephrine / Q000592:standards / Q000652:urine; D010380:Peer Review; D011786:Quality Control; D011933:Reagent Kits, Diagnostic / Q000592:standards; D012015:Reference Standards
chemical_list: D011933:Reagent Kits, Diagnostic; D009647:Normetanephrine; D008676:Metanephrine