1. Diabetes and Endocrinology, Leicester Royal Infirmary, LE1 5WW, UK
2. George Eliot Hospital, Nuneaton, CV10 7DJ, UK
3. Walsgrave Hospital, Clifford Bridge Road, Coventry, CV2 2DX, UK
4. Norfolk and Norwich University Hospital, Norwich, Colney Lane, Norwich, NR4 7UY, UK
5. Institute of Clinical Education, Warwick Medical School, The University of Warwick, Gibbet Hill Road, Coventry, West Midlands, CV4 7AL, UK,