1. Faculty of Medicine and Health Technology, Tampere University, 33520 Tampere, Finland
2. Department of Phoniatrics, Tampere University Hospital, 33520 Tampere, Finland
3. Allergy Centre, Tampere University Hospital, 33520 Tampere, Finland
4. Department of Clinical Physiology and Nuclear Medicine, Tampere University Hospital, 33520 Tampere, Finland