1. Department of Biostatistics and Epidemiology, School of Public Health and Health Sciences, University of Massachusetts Amherst, Amherst, Massachusetts
2. Institute of Public Health and Clinical Nutrition, University of Eastern Finland, Kuopio, Finland
3. Department of Endocrinology, Helsinki University Hospital and University of Helsinki, Helsinki, Finland
4. Institute of Clinical Medicine, University of Eastern Finland, Kuopio, Finland