Affiliation: | 1. Department of Otorhinolaryngology, Helsinki University Central Hospital, Helsinki, Finland;2. Department of Oral and Maxillofacial Diseases, Helsinki University Central Hospital, Helsinki, Finland Institute of Dentistry, University of Helsinki, Helsinki, Finland Division of Periodontology, Department of Dental Medicine, Karolinska Institutet, Huddinge, Sweden;3. Department of Oral and Maxillofacial Diseases, Helsinki University Central Hospital, Helsinki, Finland Institute of Dentistry, University of Helsinki, Helsinki, Finland;4. Department of Otolaryngology–Head and Neck Surgery, Temple University, Philadelphia, PA |