1. Department of Otolaryngology – Head and Neck Surgery, University of Iowa Hospitals and Clinics, Iowa City, Iowa, USA
2. Department of Surgery, Tulane University School of Medicine, New Orleans, Louisiana, USA
3. Department of Otolaryngology – Head and Neck Surgery, Harvard Medical School, Boston, Massachusetts, USA
4. Division of Thyroid and Parathyroid Endocrine Surgery, Massachusetts Eye and Ear Infirmary, Boston, Massachusetts, USA
5. Division of Surgical Oncology, Department of Surgery, Massachusetts General Hospital, Boston, Massachusetts, USA