1. Department of Anatomy, First Faculty of Medicine, Charles University, Prague, Czech Republic
2. Department of Plastic Surgery, Third Faculty of Medicine, Charles University and University Hospital Královské Vinohrady, Prague, Czech Republic
3. Department of Otolaryngology, Newcastle University Hospitals, Newcastle-upon-Tyne, UK
4. Department of Neurosurgery and Neurooncology, First Faculty of Medicine, Charles University and Military University Hospital Prague, Prague, Czech Republic