1. Research Centre for Health Promotion, University of Jyväskylä Faculty of Sport and Health Sciences, , Keskussairaalantie 4, 40014 , Finland
2. University of Eastern Finland Faculty of Health Sciences, Department of Nursing Science, , Yliopistonrinne 3, 70211 Kuopio , Finland
3. Tampere University Faculty of Social Sciences, Unit of Health Sciences, , Arvo Ylpön katu 34, 33014 , Finland
4. Open University, University of Jyväskylä Health Sciences, , Alvar Aallon katu 9, 40014 , Finland