1. Molecular Oncology and Viral Pathology Group; Portuguese Oncology Institute of Porto; Porto Portugal
2. Virology Service; Portuguese Oncology Institute of Porto; Porto Portugal
3. Otorhinolaryngology Service; Portuguese Oncology Institute of Porto; Porto Portugal
4. Abel Salazar Institute for the Biomedical Sciences (ICBAS); University of Porto; Porto Portugal
5. Faculty of Health Sciences of Fernando Pessoa University; CEBIMED; Porto Portugal
6. Research Department; Portuguese League Against Cancer (Liga Portuguesa Contra o Cancro - Núcleo Regional do Norte); Porto Portugal