1. Department of Neurological Surgery, University of Miami Hospital, Miami, Florida, United States,
2. Department of Neurosurgery, Affiliated Hospital of Atitus Education School of Medicine, Rio Grande do Sul, Brazil.
3. Department of Pathology, School of Medicine and Postgraduate Program in Dentistry, University of Passo Fundo, Passo Fundo, Rio Grande do Sul, Brazil.
4. Department of Radiology, Affiliated Hospital of Atitus Education School of Medicine, Passo Fundo, Rio Grande do Sul, Brazil.
5. Department of Neurology, Affiliated Hospital of Atitus Education School of Medicine, Passo Fundo, Rio Grande do Sul, Brazil.