Failure to demonstrate a hormonal inhibitor of proximal sodium reabsorption

^{Laboratory of Kidney and Electrolyte Metabolism, National Heart Institute, Bethesda, Maryland 20014}

^{Department of Medicine, Charing Cross Hospital Medical School, London, England}

^{Department of Internal Medicine II, University of Cologne, Köln-Merheim, Germany}

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^{Laboratory of Kidney and Electrolyte Metabolism, National Heart Institute, Bethesda, Maryland 20014}

^{Department of Medicine, Charing Cross Hospital Medical School, London, England}

^{Department of Internal Medicine II, University of Cologne, Köln-Merheim, Germany}

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^{Laboratory of Kidney and Electrolyte Metabolism, National Heart Institute, Bethesda, Maryland 20014}

^{Department of Medicine, Charing Cross Hospital Medical School, London, England}

^{Department of Internal Medicine II, University of Cologne, Köln-Merheim, Germany}

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^{Laboratory of Kidney and Electrolyte Metabolism, National Heart Institute, Bethesda, Maryland 20014}

^{Department of Medicine, Charing Cross Hospital Medical School, London, England}

^{Department of Internal Medicine II, University of Cologne, Köln-Merheim, Germany}

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^{Laboratory of Kidney and Electrolyte Metabolism, National Heart Institute, Bethesda, Maryland 20014}

^{Department of Medicine, Charing Cross Hospital Medical School, London, England}

^{Department of Internal Medicine II, University of Cologne, Köln-Merheim, Germany}

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^{Laboratory of Kidney and Electrolyte Metabolism, National Heart Institute, Bethesda, Maryland 20014}

^{Department of Medicine, Charing Cross Hospital Medical School, London, England}

^{Department of Internal Medicine II, University of Cologne, Köln-Merheim, Germany}

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^{Laboratory of Kidney and Electrolyte Metabolism, National Heart Institute, Bethesda, Maryland 20014}

^{Department of Medicine, Charing Cross Hospital Medical School, London, England}

^{Department of Internal Medicine II, University of Cologne, Köln-Merheim, Germany}

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^{Laboratory of Kidney and Electrolyte Metabolism, National Heart Institute, Bethesda, Maryland 20014}

^{Department of Medicine, Charing Cross Hospital Medical School, London, England}

^{Department of Internal Medicine II, University of Cologne, Köln-Merheim, Germany}

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^{Laboratory of Kidney and Electrolyte Metabolism, National Heart Institute, Bethesda, Maryland 20014}

^{Department of Medicine, Charing Cross Hospital Medical School, London, England}

^{Department of Internal Medicine II, University of Cologne, Köln-Merheim, Germany}

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