1. Department of Otolaryngology – Head and Neck Surgery, University of Utah, Salt Lake City, Utah, USA
2. Division of Rhinology and Sinus Surgery/Oregon Sinus Center, Department of Otolaryngology – Head and Neck Surgery, Oregon Health & Science University (OHSU), Portland, OR, USA
3. Department of Otolaryngology – Head and Neck Surgery, University of Indiana, Indianapolis, IN, USA
4. Department of Otolaryngology – Head and Neck Surgery, University of California, Los Angeles, CA, USA
5. Department of Otolaryngology –Head and Neck Surgery, Medical University of South Carolina, Charleston, SC, USA
6. Department of Otolaryngology – Head and Neck Surgery, University of Michigan, Ann Arbor, MI, USA