1. Department of Otorhinolaryngology‐Head and Neck Surgery, Helsinki University HospitalUniversity of HelsinkiHelsinki Finland
2. Samuel Oschin Comprehensive Cancer Institute, Cedars‐Sinai Medical CenterLos Angeles California
3. Department of SurgeryCedars‐Sinai Medical CenterLos Angeles California
4. Department of Biostatistics and BioinformaticsCedars‐Sinai Medical CenterLos Angeles California
5. Department of Radiation OncologyCedars‐Sinai Medical CenterLos Angeles California
6. Institute of Biomedicine, Department of PathologyUniversity of Turku and Turku University HospitalTurku Finland