title: How flexible is USP General Chapter <823>?
authors.forename: Joseph C
authors.initials: JC
authors.lastname: Hung
mesh_terms: D006801:Humans; D010602:Pharmacopoeias as Topic; D049268:Positron-Emission Tomography / Q000379:methods / Q000592:standards*; D017410:Practice Guidelines as Topic; D014481:United States