1. ; Department of Internal Medicine; Universidade Federal do Rio Grande do Sul; Brazil
2. Department of Neuroradiology; Mãe de Deus Center; Porto Alegre
3. ; Medical Genetics Service; Hospital de Clínicas de Porto Alegre; Porto Alegre
4. ; Department of Neuroradiology; Hospital Moinhos de Vento; Porto Alegre
5. ; Department of Genetics; Universidade Federal do Rio Grande do Sul; Brazil