1. Doctoral Candidate, Department of Nursing Science, University of Tampere, Finland,
2. Associate Professor, University of Tampere, Tampere University Hospital, and Biometry Unit, Tampere School of Public Health, Finland,
3. Professor, Department of Nursing Science, University of Tampere, Tampere, Finland,
4. Senior Lecturer, Department of Nursing Science, University of Kuopio, Kuopio, Finland