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