1. Department of Nursing Science, University of Turku, Turku, Finland
2. Turku University Hospital, Finland
3. Institute of Health Sciences, Vilnius University, Vilnius, Lithuania
4. Nursing Department, Universitat Internacional de Catalunya, Barcelona, Sant Cugat del Valles, Spain
5. School of Nursing, Psychotherapy and Community Health, Dublin City University, Dublin, Ireland
6. Unit of Biostatistics, Faculty of Medicine, University of Turku, Turku, Finland
7. Institute of Health and Nursing Sciences, Martin Luther University Halle-Wittenberg, Halle, Germany
8. University of Iceland, Faculty of Nursing, Reykjavik, Iceland