1. Department of Oral Biology, Faculty of Dentistry University of Oslo Oslo Norway
2. Department of Pathology Rikshospitalet, Oslo University Hospital Oslo Norway
3. Department of Stomatology, School of Dentistry University of São Paulo São Paulo Brazil
4. Laboratory of Virology, Institute of Tropical Medicine of São Paulo, School of Medicine University of São Paulo São Paulo Brazil
5. Centre for Oral Immunobiology and Regenerative Medicine, Institute of Dentistry, Barts and The London School of Medicine and Dentistry Queen Mary University of London London UK
6. China‐British Joint Molecular Head and Neck Cancer Research Laboratory Affiliated Stomatological Hospital of Guizhou Medical University Guiyang China