1. Research Unit of Clinical Nursing, Bispebjerg & Frederiksberg University Hospital, Copenhagen, Denmark.
2. Medical Department O, Herlev University Hospital, Herlev, Denmark.
3. Research Unit of Nursing, Institute of Clinical Research, University of Southern Denmark, Odense, Denmark.
4. Department of Biostatistics Copenhagen, University of Copenhagen, Copenhagen, Denmark.
5. Intersectoral Research Unit, Bispebjerg & Frederiksberg University Hospital, Copenhagen, Denmark.
6. Medical Department M, Bispebjerg & Frederiksberg University Hospital, Frederiksberg, Denmark.