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Contributor Information
S. A. Abdulali, Registrar in Cardiology, Leeds General Infirmary
E. T. Hunt, Consultant Physician, Huddersfield Royal Infirmary
D. R. Smith, Consultant Cardiologist, Leeds General Infirmary






S. A. Abdulali, Registrar in Cardiology, Leeds General Infirmary
E. T. Hunt, Consultant Physician, Huddersfield Royal Infirmary
D. R. Smith, Consultant Cardiologist, Leeds General Infirmary