1. Department of Otolaryngology/Head and Neck Surgery, University of North Carolina Hospitals, Chapel Hill, North Carolina
2. Department of General Surgery, Division of Plastic and Reconstructive Surgery, University of North Carolina Hospitals, Chapel Hill, North Carolina
3. The Hand Center of San Antonio and The University of Texas Health Science Center, San Antonio, Texas
4. Department of Plastic and Reconstructive Surgery, Policlinico di Modena, University of Modena and Reggio Emilia, Modena, Italy