1. Health Sciences, Faculty of Social Sciences, University of Tampere, Tampere, Finland
2. Gerontology Research Center, University of Tampere, Tampere, Finland
3. Finnish Institute of Occupational Health, Helsinki, Finland
4. Gerontology Research Center and Faculty of Sport and Health Sciences, University of Jyväskylä, Jyväskylä, Finland
5. Folkhälsan Research Center, Helsinki, Finland
6. Juhani Ilmarinen Consulting Ltd., Vantaa, Finland