1. Department of Medicine
2. Chemical Pathologist, Department of Chemical Pathology and
3. Department of Cardiology, Bedford Hospital, Bedford MK42 9DJ,
4. Cardiothoracic Surgeon at Papworth Hospital. Papworth Everard, Cambridge, and
5. Unit on Genetics and Endocrinology, Developmental Endocrinology Branch, National Institute of Child Health and Development, National Institute of Health, Bethesda, MD, USA