title: Commentary.
authors.affiliation: Renal Testing Laboratory, Mayo Clinic, Rochester, MN. lieske.john@mayo.edu.
authors.forename: John C
authors.initials: JC
authors.lastname: Lieske
mesh_terms: D006801:Humans; D007008:Hypokalemia / Q000150:complications* / Q000652:urine*; D008275:Magnesium Deficiency / Q000150:complications* / Q000652:urine*; D008297:Male