1. Centro de Neurologia Neurocirugia Funcional, The Toronto Hospital, Toronto Western Division, Department of Surgery, University of Toronto, Toronto, Canada
2. Clinica Quiron, Parque Alcolea, Spain, Department of Neurosurgery, The Toronto Hospital, Toronto Western Division, Department of Surgery, University of Toronto, Toronto, Canada
3. Hospital de Navarra, Irunlarrea, Pamplona, Spain, and Division of Neurosurgery, The Toronto Hospital, Toronto Western Division, Department of Surgery, University of Toronto, Toronto, Canada