1. Section of Nursing, Department of Health Sciences, Faculty of Medicine, Lund University, Box 157, Baravägen 3, 221 00 Lund, Sweden
2. Section of Elderly, Municipality of Hässleholm, Löjtnant Granlundsväg 14, 28152 Hässleholm, Sweden
3. Department of Health Sciences, Buskerud University College, Pb 850, Papirbredden, Grønland 58, 3007 Drammen, Norway
4. University of Skövde, Pb 408, Högskolevägen 1, 54128 Skövde, Sweden