1. Transplantation Laboratory, Haartman Institute, University of Helsinki, Helsinki, Finland;
2. Department of Oral and Maxillofacial Diseases, University of Helsinki and Helsinki University Hospital, Helsinki, Finland;
3. Department of Otorhinolaryngology, University of Tampere, Tampere, Finland;
4. Department of Ear and Oral diseases, Tampere University Hospital, Tampere, Finland;
5. University of Helsinki and HUS Imaging, Helsinki, Finland;
6. Medical Imaging Centre, Department of Radiology, Tampere University Hospital, Finland;
7. School of Public Health, University of Tampere, Tampere, Finland;
8. Department of Allergy, University of Helsinki and Helsinki University Hospital, Helsinki, Finland