1. Molecular Oncology Group, Portuguese Institute of Oncology of Porto, Porto, Portugal.
2. Molecular Virology Laboratory of Virology Service, Portuguese Institute of Oncology of Porto, Porto, Portugal.
3. ICBAS, Abel Salazar Institute for the Biomedical Sciences, University of Porto, Porto, Portugal.
4. Otorrinolaryngology Service, Portuguese Institute of Oncology of Porto, Porto, Portugal.