1. Department of Otolaryngology, Harvard Medical School, Boston, Massachusetts, USA
2. Department of Otolaryngology, Oregon Health and Science University, Portland, Oregon, USA
3. Department of Otolaryngology, Hospital Universitari de la Vall d’Hebron, Department of Surgery, Universitat Autònoma de Barcelona, Barcelona, Spain
4. Department of Otolaryngology, SUNY Downstate Medical Center, New York, New York, USA
5. School of Medicine, Emory University, Atlanta, Georgia, USA