1. Department of Medicine, Faculdade Israelita de Ciências da Saúde Albert Einstein, São Paulo, Brazil,
2. Neurosurgical Service, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, USA,
3. Department of Neurosurgery, Mayo Clinic, Jacksonville, Florida, United States,
4. Department of Interventional Neuroradiology, Hospital Beneficência Portuguesa de São Paulo, São Paulo, Brazil.