1. Department of Nursing Science; University of Turku; Turku Finland
2. Department of Nursing Science; University of Turku and Turku University Hospital; Turku Finland
3. Department of Nursing Science; University of Turku, Finland and Group Administration, Helsinki University Central Hospital; Helsinki Finland
4. Department of Nursing Science; University of Turku and Central Finland Health Care District; Turku Finland
5. Department of Biostatistics; University of Turku; Turku Finland
6. University of Turku and Turku University Hospital; Turku Finland