[1] Stavanger University Hospital,Centre for Movement Disorders, Centre for Brain Health
[2] University of Stavanger,Department of Chemistry, Bioscience and Environmental Engineering
[3] Stavanger University Hospital,Department of Neurology
[4] University of Stavanger,Department of Social Studies
[5] Stavanger University Hospital,Section of Biostatistics, Department of Research
[6] University of Bergen,Department of Clinical Medicine
[7] Haukeland University Hospital,Department of Neurology