1. Department of Nursing Science, FI-20014, University of Turku
2. Turku University Hospital, Health Village , Turku , Finland
3. Turku University Hospital , Turku , Finland
4. Nursing School of Coimbra , Rua 5 de Outubro, Apartado 7001, 3046-851 Coimbra , Portugal
5. Nursing Research Foundation sr (NRF) , Asemamiehenkatu 2, 00520 Helsinki , Finland