[1] St.Olavs University Hospital,Department Physical Medicine and Rehabilitation
[2] Norwegian University of Science and Technology,Department of Public Health and General Practice
[3] Norwegian University of Science and Technology,Institute of Neuromedicine, Faculty of Medicine
[4] Trondheim University Hospital,Department of Orthopedic Surgery
[5] UiT The Arctic University of Norway,Department of Clinical Medicine, Neuromuscular Diseases Research Group
[6] Unicare Medical Rehabilitation Centre,undefined