title: What is a reference standard?
authors.affiliation: From the Department of Anesthesiology, University of Florida, Gainesville, Florida.
authors.forename: Timothy E
authors.initials: TE
authors.lastname: Morey
authors.forename: Mark J
authors.initials: MJ
authors.lastname: Rice
authors.forename: Nikolaus
authors.initials: N
authors.lastname: Gravenstein
mesh_terms: D006452:Hemoglobinometry / Q000379:methods*; D006801:Humans; D016343:Monitoring, Intraoperative / Q000379:methods*; D010092:Oximetry / Q000379:methods*; D013123:Spinal Fusion / Q000379:methods*