Contributors to This Issue ALLEN L ARIEFF, MD, Professor of Medicine, University of California, San Francisco; Chief, Clinical Nephrology, San Francisco VA Medical Center, 4150 Clement Street (lllJ), San Francisco, CA 94121, USA. P. H. BAYLIS, BSe, MD, FRCP, Senior Lecturer in Medicine, University of Newcastle upon Tyne; Consultant Physician, Royal Victoria Infirmary, Newcastle upon Tyne NE1 4LP. ROBERT FRASER, PhD, FRSE, Senior Scientific Officer, Medical Research Council Blood Pressure Unit, Western Infirmary, Glasgow G l l 6NT. G. V. GILL, MSc, MD, MRCP, Senior Registrar, Department of Clinical Biochemistry and Metabolic Medicine, Royal Victoria Infirmary, Newcastle upon Tyne NE1 4LP. DAVID A. GOODKIN, MD, Instructor in Medicine, Renal Section, Temple University Health Sciences Center, Philadelphia, PA 19140, USA. MARTIN S. KNAPP, MD, FRCP, Senior Research Fellow, Department of Obstetrics, Queen's Medical Centre, University of Nottingham, Nottingham NG7 2UH. GOLLAPUDI G. KRISHNA, MD, Assistant Professor of Medicine and Associate Director, Hemodialysis Unit, Temple University Health Sciences Center, Philadelphia, PA 19140, USA. MICHAEL LYE, MD, MRCP, Professor, Department of Geriatric Medicine, University of Liverpool, Royal Victoria Hospital, Prescot Street, PO Box 147, Liverpool L69 3BX. D. BRIAN MORGAN, MD, MRCPath, Professor and Head, Department of Chemical Pathology, University of Leeds, Leeds LS2 9JT; Honorary Consultant Chemical Pathologist, Leeds Western Health Authority. ROBERT G. NARINS, MD, Professor of Medicine and Chief, Renal Section, Temple University Health Sciences Center, Philadelphia, PA 19140, USA. PHILIP A. POOLE-WILSON, MD, FRCP, Professor of Cardiology, Cardiothoracic Institute,
2 Beaumont Street, London W1N 2DX, and National Heart Hospital, London. DAVID E. F. TWEEDLE, MB ChB, FRCSEd, ChM, Honorary Senior Lecturer, University of Manchester; Consultant Surgeon, University Hospital of South Manchester, West Didsbury, Manchester M20 8LR.