1. Department of Medicine, Universidade de Pernambuco, Pernambuco, Brazil,
2. Department of Neurosurgery, Real Hospital Português de Beneficência em Pernambuco, Pernambuco, Brazil,
3. Department of Medicine, Faculdade Pernambucana de Saúde, Pernambuco, Brazil,
4. Department of Medicine, Universidade Católica dePernambuco, Pernambuco, Brazil,
5. Department of Medicine, UniNassau, Pernambuco, Brazil,
6. Department of Neurosurgery, Hospital da Restauração, Recife, Pernambuco, Brazil,