1. Rovaniemi Health Centre, Rovaniemi, Finland
2. Elermore Vael General Practice, Elermore Vale, Australia
3. Conmedic, Espoo, Finland
4. Infrastructure for Population Studies, Faculty of Medicine, University of Oulu, Oulu, Finland
5. Unit of General Practice, Oulu University Hospital, Oulu, Finland
6. Endocrinology, Department of Clinical and Experimental Medicine, University of Catania, Catania, Italy
7. Diabetes, Obesity and Dietetic Center, Garibaldi-Nesima Medical Center, Catania, Italy
8. Center for Life Course Health Research, University of Oulu, Oulu, Finland