1. Department of Clinical Neurosciences, Division of Neurosurgery, University of Calgary, Cumming School of Medicine, Calgary, Alberta, Canada;
2. Department of Health, Medicine and Caring Sciences, Faculty of Medicine and Health Sciences, Linköping University, Linköping, Sweden;
3. Unit of Neurosurgery, IRCCS Istituto delle Scienze Neurologiche di Bologna, Italy;
4. Department of Neurologic Surgery, Mayo Clinic, Rochester, Minnesota;
5. Departments of Neurology and
6. Neurological Surgery, University of Washington Medicine, Seattle, Washington