1. Addenbrooke’s Hospital, Cambridge University Medical School, Cambridge, U.K
2. University Department of Pathological Biochemistry, Glasgow Royal Infirmary, Glasgow, U.K
3. Department of Medicine #7873, University of Texas Health Science Center at San Antonio, San Antonio, Texas
4. Center de Estudios in Diabetes, Mexico City, Mexico
5. Department of Human Nutrition, Glasgow Royal Infirmary, Glasgow, U.K