1. Department of Neurology and Neurosurgery, Universidade Federal de São Paulo, São Paulo, SP, Brazil;
2. School of Medicine, University of Glasgow, Glasgow, UK;
3. Department of Neurology, Hospital del Mar, Barcelona, Spain;
4. Department of Neuroradiology, Hospital Beneficência Portuguesa de São Paulo, São Paulo, SP, Brazil;
5. Department of Neurosurgery, Hospital Beneficência Portuguesa de São Paulo, São Paulo, SP, Brazil