1. Laboratory of Kidney and Electrolyte Metabolism, National Heart, Lung and Blood Institute, National Institutes of Health, Bethesda, MD 20892
2. Department of Molecular Genetics, Biochemistry and Microbiology, University of Cincinnati School of Medicine, Cincinnati, OH 45267, USA
3. Department of Molecular and Cellular Physiology, University of Cincinnati School of Medicine, Cincinnati, OH 45267, USA