1. Helsinki University Central Hospital, Skin and Allergy Hospital, Helsinki, Finland
2. Transplantation Laboratory, Hartman Institute, University of Helsinki, Helsinki, Finland
3. Department of Otorhinolaryngology, University of Tampere, Tampere Finland and Terveystalo Healthcare OYJ of Finland
4. Department of Otorhinolaryngology, Päijat-Häme Central Hospital, Lahti, Finland
5. Department of Otorhinolaryngology, Helsinki University Central Hospital, Helsinki, Finland