1. Renal-Electrolyte Division, Department of Medicine, University of Pittsburgh Medical Center, Pittsburgh, PA
2. Department of Medicine, University of Pittsburgh Medical Center, Pittsburgh, PA
3. Health Sciences Library System, University of Pittsburgh, Pittsburgh, PA
4. Division of Pulmonary, Critical Care and Sleep Medicine, Department of Internal Medicine, University of New Mexico, Albuquerque, NM
5. Nephrology Division, Department of Internal Medicine, University of New Mexico, Albuquerque, NM