1. Gerontology Research Center and Faculty of Sport and Health Sciences, University of Jyväskylä, Jyväskylä, Finland
2. The Wellbeing Services County of Central Finland, Jyväskylä, Finland
3. School of Medicine, University of Eastern Finland, Kuopio, Finland
4. Department of Psychology, Faculty of Education and Psychology, University of Jyväskylä, Jyväskylä, Finland
5. Finnish Youth Research Society, Helsinki, Finland
6. Faculty of Education and Psychology, University of Jyväskylä, Jyväskylä, Finland