1. Department of Oral and Maxillofacial Diseases, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
2. Oral and Dental Health Department, Altinbas University, Istanbul, Turkey
3. Department of Otorhinolaryngology- Head and Neck Surgery, Helsinki University Hospital and University of Helsinki, Helsinki, Finland
4. Research Program in Systems Oncology, Faculty of Medicine, University of Helsinki, Helsinki, Finland
5. Division of Pediatric Surgery, Children’s Hospital, Helsinki University Hospital and University of Helsinki, Helsinki, Finland
6. Division of Periodontology, Department of Dental Medicine, Karolinska Institutet, Huddinge, Sweden
7. Oral Health Sciences Centre, Post Graduate Institute of Medical Education & Research, Chandigarh, India