1 Head and Neck Radiology and Neuroradiology Section, Department of Radiology, Hospital Sírio-Libanês, Sao Paulo, Brazil; Head and Neck Radiology Section, Department of Radiology, Hospital do Servidor Público Estadual de Sao Paulo (IAMSPE), Sao Paulo, Brazil.
2 Head and Neck Radiology Section, Department of Radiology, Hospital Sírio-Libanês, Sao Paulo, Brazil; Head and Neck Radiology Section, Department of Radiology, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, Brazil.