1. Department of Head and Neck Surgery and Oncology, The Netherlands Cancer Institute, Amsterdam, The Netherlands
2. Department of Facial Plastic and Reconstructive Surgery, Lohuis-Filipović Medial Group, Zagreb, Croatia
3. Department of Facial Plastic and Reconstructive Surgery, Bergman Clinics, Hilversum, The Netherlands
4. Department of Sleep Medicine, Ruysdael Clinics, Amsterdam, The Netherlands