1. Department of Obstetrics and Gynecology University of Helsinki, and Helsinki University Hospital Helsinki Finland
2. Department of Obstetrics and Gynecology HUS Hyvinkää Hospital Hyvinkää Finland
3. Department of Obstetrics and Gynecology Oulu University Hospital Oulu Finland
4. PEDEGO Research Unit University of Oulu Oulu Finland
5. Medical Research Center Oulu (MRC Oulu) University of Oulu Oulu Finland
6. Department of Biostatistics University of Helsinki Helsinki Finland
7. Finnish Institute for Health and Welfare (THL) Helsinki Finland
8. Departments of Molecular Medicine and Surgery, and Neurobiology Karolinska Institute Stockholm Sweden
9. Academic Primary Health Care Center Region Stockholm Stockholm Sweden