1. Department of General Practice and Primary Health Care, University of Helsinki, Helsinki, Finland
2. Folkhälsan Research Center, Helsinki, Finland
3. Department of Obstetrics and Gynecology and Human Potential Translational Research Programme, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
4. Agency for Science, Technology and Research, Singapore Institute for Clinical Sciences, Singapore
5. Department of Public Health Solutions, Finnish Institute for Health and Welfare, Helsinki, Finland
6. Department of Public Health Solutions, THL Finnish Institute for Health and Welfare, Helsinki and Oulu, Finland
7. PEDEGO Research Unit, MRC Oulu, Oulu University Hospital, University of Oulu, Oulu, Finland
8. Department of Clinical and Molecular Medicine, Norwegian University of Science and Technology, Trondheim, Norway
9. Children’s Hospital, Helsinki University Hospital, University of Helsinki, Helsinki, Finland
10. Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
11. Department of Radiology, Tampere University Hospital, Tampere, Finland
12. Department of Medical Epidemiology and Biostatistics, Karolinska Institute, Stockholm, Sweden