title: Commentary.
authors.affiliation: Department of Medicine, Section of Nephrology, Yale University School of Medicine, New Haven, CT. mark.perazella@yale.edu.
authors.forename: Mark A
authors.initials: MA
authors.lastname: Perazella
mesh_terms: D006801:Humans; D007008:Hypokalemia / Q000150:complications* / Q000652:urine*; D008275:Magnesium Deficiency / Q000150:complications* / Q000652:urine*; D008297:Male