1. Department of Rheumatology; The Parker Institute; Bispebjerg and Frederiksberg Hospital, Capital Region of Copenhagen; Frederiksberg Denmark
2. Institute of Public Health; University of Southern Denmark; Odense C Denmark
3. Research Unit of Clinical Nursing; Bispebjerg and Frederiksberg Hospital, Capital Region of Copenhagen; København NW Denmark
4. Section for Nursing Department of Public Health; Aarhus University; Aarhus Denmark