1. Department of Neurology, School of Medicine, Universidade de São Paulo, São Paulo, Brazil;
2. Institute of Biomedical Science, Universidade de São Paulo, São Paulo, Brazil;
3. Department of Orthopedic and Traumatology, School of Medicine, Universidade de São Paulo, São Paulo, Brazil;
4. Department of Surgery, School of Medicine, Universidade de São Paulo, São Paulo, Brazil;
5. Department of Neurosurgery, Eberhard-Karls University, Tuebingen, Germany;
6. Department of Psychiatry, School of Medicine, University de São Paulo, São Paulo, Brazil