1. Faculty of Medicine, Federal University of Rio de Janeiro, Brazil
2. Department of Neurosurgery, University of São Paulo, Brazil
3. Faculty of Medicine, State University of Ponta Grossa, Brazil
4. Department of Neurosurgery, Hospital Força-Aérea Galeão, Brazil
5. Faculty of Medicine, Max Planck University Center, Brazil
6. Department of Endovascular Neurosurgery, Paulo Niemeyer State Brain Institute, Brazil
7. Department of Neurosurgery, Paulo Niemeyer State Brain Institute, Brazil