1. Post-Graduation Program of Health Sciences, Universidade Federal de Ciências da Saúde de Porto Alegre, RS, Brazil
2. Department of Morphological Sciences, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
3. Movement Disorders Unit, Hospital de Clínicas de Porto Alegre, Porto Alegre, RS, Brazil
4. Department of Medical Sciences, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
5. Department of Surgery and Orthopaedics, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil