Corresponding Author

Lotta-Maria Oksanen

University of Helsinki, Faculty of Medicine, Helsinki, Finland

Helsinki University Hospital, Department of Otorhinolaryngology and Phoniatrics – Head and Neck Surgery, Helsinki, Finland

Corresponding author

Lotta-Maria Adele Helena Oksanen, M.D, University of Helsinki, Faculty of Medicine, Helsinki University Hospital Department of Otorhinolaryngology and Phoniatrics – Head and Neck Surgery, Maistraatinportti 2, POB 250, 00029 Helsinki, Finland

email: lotta.oksanen@hus.fi