1. School of Medicine University of Eastern Finland Kuopio Finland
2. Institute of Public Health and Clinical Nutrition, School of Medicine University of Eastern Finland Kuopio Finland
3. Department of Obstetrics and Gynaecology, Kuopio University Hospital and Institute of Clinical Medicine, Obstetrics and Gynaecology University of Eastern Finland Kuopio Finland
4. Department of Pediatrics, Kuopio University Hospital and Institute of Clinical Medicine, Pediatrics University of Eastern Finland Kuopio Finland