1. Infections and Cancer Laboratory/Cancer Epidemiology Research Program. Catalan Institute of Oncology (ICO) and Bellvitge Institute of Biomedical Research (IDIBELL) Barcelona Spain
2. Centro de Investigación Biomédica en Red en Cáncer (CIBER‐ONC) Madrid Spain
3. Oncogenesis and Antitumor Drug Grouplnstitut d'Investigacions Biomèdiques Sant Pau (IIB‐Sant Pau) Barcelona Spain
4. Centro de Investigación Biomédica en Red en BioingenieríaBiomateriales y Nanomecidicina (CIBER‐BBN) Madrid Spain
5. Department of OtorrinolaryngologyHospital de la Santa Creu i Sant Pau Barcelona Spain
6. Laboratorio Hematología Oncológica y de Transplantes, Institut Investigacions Biomèdiques (IBB) Sant PauHospital de la Santa Creu i Sant Pau Barcelona Spain
7. Department of OtorrinolaryngologyHospital Germans Tries y Pujol (Can Ruti) Barcelona Spain
8. Department of PathologyHospital de la Santa Creu i Sant Pau Barcelona Spain
9. Department of Medical OncologyHospital de la Santa Creu i Sant Pau Barcelona Spain