[1
]
Clinical Research Division, Instituto Nacional de Câncer (INCA), Rio de Janeiro, Brazil.
Electronic address: hspindola@inca.gov.br.
[2
]
Head and Neck Oncology Group, Grupo de Oncologia D'Or, Brazil.
[3
]
Clinical Research Division, Instituto Nacional de Câncer (INCA), Rio de Janeiro, Brazil.
[4
]
Radiation Oncology Division, Instituto Nacional de Câncer (INCA), Rio de Janeiro,
Brazil.
[5
]
Head and Neck Surgery Division, Instituto Nacional de Câncer (INCA), Rio de Janeiro,
Brazil.
[6
]
D'Or Institute for Research and Education, Brazil.