1. Department of Surgery, Otolaryngology–Head and Neck Surgery Yale University School of Medicine New Haven Connecticut U.S.A.
2. Department of Otolaryngology–Head and Neck Surgery The University of Vermont Medical Center Burlington Vermont U.S.A.
3. Center for Advanced Facial Plastic Surgery Beverly Hills California U.S.A.
4. Division of Head and Neck Surgery, Department of Otolaryngology–Head and Neck Surgery David Geffen School of Medicine at the University of California Los Angeles California Los Angeles U.S.A.
5. Department of Surgery, Division of Plastic Surgery Baystate Medical Center Springfield Massachusetts U.S.A.