*Department of Pathology, University of Helsinki

†Institute of Biomedicine, Pathology, University of Turku

#Research Programs Unit, Translational Cancer Medicine, University of Helsinki

∥∥Department of Otorhinolaryngology—Head and Neck Surgery, University of Helsinki and Helsinki University Hospital

‡Research Program in Systems Oncology, University of Helsinki, Helsinki

∥Department of Otorhinolaryngology—Head and Neck Surgery, Turku University Hospital and University of Turku

¶Department of Oral Pathology and Radiology, University of Turku

##Turku University Central Hospital, Turku

**School of Medicine, Institute of Clinical Medicine, Pathology and Forensic Medicine

††Cancer Center of Eastern Finland, University of Eastern Finland

‡‡Imaging Center, Clinical Pathology, Kuopio University Hospital, Kuopio

§§Medical Informatics and Data Analysis Research Group, University of Oulu, Oulu, Finland

§Faculty of Dentistry, Misurata University, Misurata, Libya

¶¶Department of Clinical Sciences, Intervention and Technology, Division of Ear, Nose, and Throat Diseases, Karolinska Institutet and Karolinska University Hospital, Stockholm, Sweden

Conflicts of Interest and Source of Funding: Supported by The Finnish Cancer Society, the Turku University Hospital Fund, Finska Läkaresällskapet, Maritza and Reino Salonen Foundation, K. Albin Johansson Foundation, the Finnish Dental Society Apollonia, the Helsinki University Hospital Research Fund, and the Sigrid Jusélius Foundation. The authors have disclosed that they have no significant relationships with, or financial interest in, any commercial companies pertaining to this article.

Correspondence: Alhadi Almangush, DDS, PhD, Department of Pathology, University of Helsinki, Haartmaninkatu 3, P.O. Box 21, FIN-00014 Helsinki, Finland (e-mail: [email protected]).