title: Data on biological variation: essential prerequisites for introducing new procedures?
authors.forename: C G
authors.initials: CG
authors.lastname: Fraser
mesh_terms: D002624:Chemistry, Clinical / Q000379:methods* / Q000592:standards; D002986:Clinical Trials as Topic; D006801:Humans; D008991:Monitoring, Physiologic; D012015:Reference Standards; D012680:Sensitivity and Specificity