1. Department of Obstetrics and Gynaecology, Research Unit of Clinical Medicine & Medical Research Center Oulu, Oulu University Hospital, University of Oulu , Oulu, Finland
2. Department of Obstetrics and Gynaecology, Helsinki University Hospital and University of Helsinki , Helsinki, Finland
3. Department of Children and Adolescents, Research Unit of Clinical Medicine & Medical Research Center Oulu, Oulu University Hospital, University of Oulu , Oulu, Finland
4. Department of Knowledge Brokers, Finnish Institute for Health and Welfare , Helsinki, Finland
5. Department of Molecular Medicine and Surgery, Karolinska Institute , Stockholm, Sweden
6. Academic Primary Health Care Centre, Region Stockholm , Stockholm, Sweden