1. Boston University School of Medicine, Boston, MA, USA
2. Department of Anesthesia & Critical Care, University of Chicago Medical Center, Chicago, IL, USA
3. Department of Otolaryngology – Head and Neck Surgery, University at Buffalo Jacobs School of Medicine and Biomedical Sciences, Buffalo, NY, USA
4. Department of Otolaryngology – Head and Neck Surgery, University of North Carolina Hospitals, Chapel Hill, NC, USA
5. Department of Otolaryngology – Head and Neck Surgery, Columbia University Irving Medical Center, New York, NY, USA
6. Department of Otolaryngology – Head and Neck Surgery, Boston Medical Center, Boston, MA, USA