1. Institute of Nursing Science; University of Basel; Switzerland
2. University Hospital Insel; Bern Switzerland
3. CAPHRI School for Public Health and Primary Care; Department of Health Services Research; Maastricht University; the Netherlands
4. Inselspital Bern University Hospital; Nursing & Midwifery Research Unit; Switzerland
5. Department of Health Promotion & Development; School of Nursing; University of Pittsburgh; Pennsylvania USA
6. College for Health-Care Professionals Claudiana; Research Department; Bozen Italy