1. Diabetes Research Centre, University of Leicester, Leicester General Hospital , Gwendolen Road, Leicester LE5 4WP , UK
2. Institute of Public Health and Clinical Nutrition, University of Eastern Finland , Kuopio , Finland
3. Institute of Clinical Medicine, Department of Medicine, University of Eastern Finland , Kuopio , Finland
4. Department of Medicine, Wellbeing Services County of Central Finland , Jyväskylä , Finland