Research Department, Sunnaas Rehabilitation Hospital, Nesodden, Norway. Electronic address: linda.rennie@sunnaas.no. Department of Neurology, Oslo University Hospital and Faculty of Medicine, University of Oslo, Norway. Electronic address: espen.dietrichs@medisin.uio.no. Physiotherapy Research Group, Department of Global Public Health and Primary Health Care, University of Bergen, Norway. Electronic address: Rolf.Moe-Nilssen@uib.no. Research Department, Sunnaas Rehabilitation Hospital, Nesodden, Norway; Institute of Neuroscience and Physiology, University of Gothenberg, Sweden; Habilitation & Health, Region Västra Götaland, Sweden. Electronic address: Arve.Opheim@vgregion.se. Research Department, Sunnaas Rehabilitation Hospital, Nesodden, Norway; Karolinska Institutet, Department of Neurobiology, Care Sciences and Society, Division of Physiotherapy, Stockholm, Sweden; Functional Area Occupational Therapy & Physiotherapy, Allied Health Professionals Function, Karolinska University Hospital, Stockholm, Sweden. Electronic address: Erika.franzen@ki.se.