1. Department of Otolaryngology Head and Neck Surgery, Katholieke Universiteit Leuven, Leuven, Flanders, Belgium
2. Department of Otolaryngology Head and Neck Surgery, Brooke Army Medical Center, Houston, Texas
3. Harvard Medical School, Boston, Massachusetts
4. Department of Plastic Surgery, Private Practice, Bergamo, Italy
5. Department of Plastic, Reconstructive, Aesthetic and Hand Surgery, University Hospital, Basel, Switzerland
6. Department of Otorhinolaryngology, Mayo Clinic, Rochester, Minnesota
7. Department of Otorhinolaryngology Head and Neck Surgery, Hospital Moliere Longchamp, Brussel, Belgium