1. Department of Neurosurgery, Copenhagen University Hospital, København Ø, Denmark
2. Department of Neurology, Aalborg University Hospital, Aalborg, Denmark
3. Department of Orthopaedic Surgery, Odense University Hospital, Odense, Denmark
4. Department of Clinical Research, University of Southern Denmark, Denmark
5. Department of Neurosurgery, Odense University Hospital, Odense C, Denmark
6. Department of Neurology, Copenhagen University Hospital, København Ø, Denmark
7. Department of Neurology, Bispebjerg Hospital, København, Denmark
8. Department of Neurology, The Danish Stroke Center, Aarhus University Hospital, Aarhus N, Denmark