1. Faculty of Health Sciences, Department of Public Health and Clinical Nutrition, University of Eastern Finland , Yliopistonranta 8, Kuopio, 70210 , Finland
2. Faculty of Medicine, Department of Nursing Science, University of Turku , Medisiina B, Kiinamyllynkatu 10, Turku, 20520, Finland
3. Faculty of Social Sciences, Unit of Health Sciences, Nursing Science, University of Tampere , Kalevantie 5, Tampere, 33100 , Finland