1. Department of Otolaryngology – Head and Neck Surgery Thomas Jefferson University Hospital Philadelphia Pennsylvania U.S.A.
2. Department of Otolaryngology – Head and Neck Surgery Oregon Health and Science University Portland Oregon U.S.A.
3. Department of Oral and Maxillofacial Surgery Oregon Health and Science University Portland Oregon U.S.A.
4. Division of Biostatistics, Department of Pharmacology and Experimental Therapeutics Thomas Jefferson University Philadelphia Pennsylvania U.S.A.
5. Department of Otolaryngology – Head and Neck Surgery Louisiana State University Baton Rouge Louisiana U.S.A.