1. Postgraduate program in Medicine: Medical sciences, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
2. Phonoaudiology Department, Universidade Federal de Ciências da Saúde de Porto Alegre, Porto Alegre, RS, Brazil
3. Phonoaudiology Department, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil
4. Neurology Service, Hospital de Clínicas de Porto Alegre, Porto Alegre, RS, Brazil