1. Department of Nursing Science, School of Health Sciences, Jönköping University, P.O. Box 1026, 551 11 Jönköping, Sweden
2. Department of Health Sciences, Karlstad University, Karlstad, Sweden
3. Faculty of Caring Science, Work Life and Social Welfare, PreHospen-Centre for Prehospital Research, University of Borås, Borås, Sweden