1 Department of Physical Medicine and Rehabilitation, Oslo University Hospital, Oslo, Norway. nandelic@online.no.
2 Faculty of Medicine, Institute of Health and Society, Research Centre for Habilitation and Rehabilitation Models and Services (CHARM), University of Oslo, Oslo, Norway. nandelic@online.no.
3 Department of Physical Medicine and Rehabilitation, Oslo University Hospital, Oslo, Norway.
4 Faculty of Medicine, Institute of Clinical Medicine, University of Oslo, Oslo, Norway.
5 Oslo Centre for Biostatistics and Epidemiology, Oslo University Hospital, Oslo, Norway.
6 Institute of Medical Psychology and Medical Sociology, University Medical Center, Göttingen, Germany.
7 Research Department, Sunnaas Rehabilitation Hospital, Bjørnemyr, Norway.
8 Department of Psychology, Faculty of Social Sciences, University of Oslo, Oslo, Norway.
9 Department of Public Health, Erasmus MC, University Medical Center, Rotterdam, The Netherlands.
10 Department of Child Neurology, Oslo University Hospital, Oslo, Norway.