1. Department of Diabetes and Angiology; Soest Germany
2. Department of Diabetology; Ahaus Germany
3. Department of Endocrinology, Diabetology and Geriatrics; Stuttgart General Hospital, Bad Cannstatt; Stuttgart Germany
4. Department of Endocrinology; OLV Aalst; Belgium
5. Scientific Institute of Public Health; OD Public Health and Surveillance; Brussels Belgium
6. Centre Santé des Fagnes; Chimay Belgium