1. Division of Plastic and Reconstructive Surgery, Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland.
2. Division of Biostatistics, Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, Maryland.
3. Endocrine Surgery Section, Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland.
4. Department of Otolaryngology, Head and Neck Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland.
5. Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland.
6. Division of Cytopathology, Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, Maryland.