1. Danish Center for Sleep Medicine, Department of Clinical Neurophysiology, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
2. Clinic for Spinal Cord Injuries, NeuroScience Centre, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
3. Department of Clinical Biochemistry, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
4. OPEN, Odense Patient data Explorative Network, Odense University Hospital/Institute of Clinical Research, University of Southern Denmark, Odense, Denmark