1. Department of Environmental Health National Institute for Health and Welfare Kuopio Finland
2. Pediatric Research Center University of Tampere and University Hospital Tampere Finland
3. Institute for Risk Assessment Sciences Utrecht University Utrecht the Netherlands
4. Institute for Laboratory Medicine and Pathobiochemistry, Molecular Diagnostics Philipps‐University Marburg Marburg Germany
5. Institute of Epidemiology and Medical Biometry Ulm University Ulm Germany
6. Departments of Obstetrics and Gynecology Kuopio University Hospital Kuopio Finland
7. Department of Pediatrics Kuopio University Hospital Kuopio Finland
8. Unit of Public Health and Clinical Nutrition University of Eastern Finland Kuopio Finland
9. Children's Hospital University of Munich Munich Germany