A physiological approach to the assessment of disease activity in rheumatoid arthritis

^{Arthritis and Rheumatism Branch, National Institute of Arthritis and Metabolic Diseases, Bethesda, Maryland 20014}

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

^{Department of Nuclear Medicine, National Institutes of Health, Bethesda, Maryland 20014}

^{Anesthesiology Department, National Institutes of Health, Bethesda, Maryland 20014}

^{Department of Orthopedic Surgery, The George Washington University Medical Center, Washington, D. C. 20005}

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^{Arthritis and Rheumatism Branch, National Institute of Arthritis and Metabolic Diseases, Bethesda, Maryland 20014}

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

^{Department of Nuclear Medicine, National Institutes of Health, Bethesda, Maryland 20014}

^{Anesthesiology Department, National Institutes of Health, Bethesda, Maryland 20014}

^{Department of Orthopedic Surgery, The George Washington University Medical Center, Washington, D. C. 20005}

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^{Arthritis and Rheumatism Branch, National Institute of Arthritis and Metabolic Diseases, Bethesda, Maryland 20014}

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

^{Department of Nuclear Medicine, National Institutes of Health, Bethesda, Maryland 20014}

^{Anesthesiology Department, National Institutes of Health, Bethesda, Maryland 20014}

^{Department of Orthopedic Surgery, The George Washington University Medical Center, Washington, D. C. 20005}

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^{Arthritis and Rheumatism Branch, National Institute of Arthritis and Metabolic Diseases, Bethesda, Maryland 20014}

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

^{Department of Nuclear Medicine, National Institutes of Health, Bethesda, Maryland 20014}

^{Anesthesiology Department, National Institutes of Health, Bethesda, Maryland 20014}

^{Department of Orthopedic Surgery, The George Washington University Medical Center, Washington, D. C. 20005}

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^{Arthritis and Rheumatism Branch, National Institute of Arthritis and Metabolic Diseases, Bethesda, Maryland 20014}

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

^{Department of Nuclear Medicine, National Institutes of Health, Bethesda, Maryland 20014}

^{Anesthesiology Department, National Institutes of Health, Bethesda, Maryland 20014}

^{Department of Orthopedic Surgery, The George Washington University Medical Center, Washington, D. C. 20005}

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^{Arthritis and Rheumatism Branch, National Institute of Arthritis and Metabolic Diseases, Bethesda, Maryland 20014}

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

^{Department of Nuclear Medicine, National Institutes of Health, Bethesda, Maryland 20014}

^{Anesthesiology Department, National Institutes of Health, Bethesda, Maryland 20014}

^{Department of Orthopedic Surgery, The George Washington University Medical Center, Washington, D. C. 20005}

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^{Arthritis and Rheumatism Branch, National Institute of Arthritis and Metabolic Diseases, Bethesda, Maryland 20014}

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

^{Department of Nuclear Medicine, National Institutes of Health, Bethesda, Maryland 20014}

^{Anesthesiology Department, National Institutes of Health, Bethesda, Maryland 20014}

^{Department of Orthopedic Surgery, The George Washington University Medical Center, Washington, D. C. 20005}

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