1. Folkhälsan Research Center , Helsinki , Finland
2. Department of Medical Epidemiology and Biostatistics, Karolinska Institutet , Stockholm , Sweden
3. Clinicum, Faculty of Medicine, University of Helsinki , Helsinki , Finland
4. Department of Health and Social Management, University of Eastern Finland , Kuopio , Finland
5. Faculty of Social Sciences (Health Sciences) and Gerontology Research Center, Tampere University , Tampere , Finland
6. Department of General Practice and Primary Health Care, University of Helsinki , Helsinki , Finland
7. Department of Public Health and Welfare, Population Health Unit, Finnish Institute for Health and Welfare , Helsinki , Finland
8. PEDEGO Research Unit, Medical Research Center Oulu, Oulu University Hospital, University of Oulu , Oulu , Finland
9. Department of Obstetrics and Gynecology and Human Potential Translational Research Programme, Yong Loo Lin School of Medicine, National University Singapore , Singapore
10. Gerontology Research Center and Faculty of Sport and Health Sciences, University of Jyväskylä , Jyväskylä , Finland