1. Nuffield Department of Clinical Biochemistry, Radcliffe Infirmary, Oxford
2. Department of Biochemistry, General Hospital, Kettering
3. Department of Endocrinology, Radcliffe Infirmary, Oxford
4. Tenovus Institute for Cancer Research, Welsh National School of Medicine, Cardiff
5. Department of Clinical Endocrinology, Birmingham and Midland Hospital for Women, Birmingham
6. Department of Chemical Pathology, City Hospital, Nottingham
7. Department of Chemical Pathology, General Hospital, Southampton, UK