1. Department of Obstetrics and Gynecology, PEDEGO Research Unit, Oulu University Hospital and University of Oulu, OYS, Oulu, Finland
2. Medical Research Centre Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland
3. Research Unit of Biomedicine, Medical Research Center, Faculty of Medicine, University of Oulu and Oulu University Hospital, Oulu, Finland
4. Infrastructure for Population Studies, Faculty of Medicine, University of Oulu, Oulu, Finland
5. Centre for Life Course Health Research, University of Oulu, Oulu, Finland
6. NordLab Oulu, Oulu University Hospital, Oulu, Finland
7. Department of Clinical Chemistry, University of Oulu, Oulu, Finland