1. Department of OtolaryngologyMassachusetts Eye and Ear Infirmary and Harvard Medical School Boston Massachusetts U. S.A.
2. Department of Otolaryngology–Head and Neck SurgeryWashington University School of Medicine St. Louis Missouri U.S.A.
3. Department of GeneticsWashington University School of Medicine St. Louis Missouri U.S.A.
4. Division of Anatomic Pathology and HistologyFondazione Policlinico Universitario “Agostino Gemelli”–IRCCS Rome Italy
5. Department of PathologyMassachusetts General Hospital and Harvard Medical School Boston Massachusetts U.S.A