1. Department of Radiology, Faculdade de Medicina da Universidade de Sao Paulo, Sao Paulo, Brazil
2. Laboratory of Medical Investigation 44, Hospital Das Clínicas, Faculdade de Medicina da Universidade de Sao Paulo, Sao Paulo, Brazil
3. Speech and Feeding Disorders Lab, MGH Institute of Health Professions (MGHIHP), Boston, Massachusetts, USA
4. Department of Neurology, Hospital Das Clínicas, Faculdade de Medicina da Universidade de Sao Paulo, Sao Paulo, Brazil
5. Department of Radiology, University of Texas Southwestern Medical Center, Dallas, Texas, USA