1. Department of Otorhinolaryngology and Head and Neck Surgery; University Hospital Motol, First Faculty of Medicine, Charles University; Prague Czech Republic
2. Department of Phoniatrics; General University Hospital, First Faculty of Medicine, Charles University; Prague Czech Republic
3. Department of Medical Informatics and Biostatistics; Institute of Computer Science AS CR; Prague Czech Republic
4. Department of Radiotherapy and Oncology; University Hospital Motol; Prague Czech Republic