1. L.H. Skjaerven, PT, MSc, is Associate Professor, Department of Physiotherapy, Faculty of Health and Social Sciences, Bergen University College, Møllendalsvei 6, 5009 Bergen, Norway.
2. K. Kristoffersen, DSSc, is Psychiatric Nurse and Professor, Faculty of Health and Sport, University of Agder, Kristiansand, Norway.
3. G. Gard, PT, PhD, is Professor, Department of Health Sciences, Luleå University, Luleå, Sweden, and Associate Professor, Department of Health Sciences, Lund University, Lund, Sweden.