title: Response to letter to the editor.
authors.forename: Daniel L
authors.initials: DL
authors.lastname: Brown
mesh_terms: D000818:Animals; D001835:Body Weight / Q000502:physiology*; D003404:Creatinine / Q000652:urine*; D006801:Humans; D007674:Kidney Diseases / Q000652:urine*; D012076:Renal Agents / Q000652:urine*
chemical_list: D012076:Renal Agents; D003404:Creatinine