1. Division of Thyroid and Parathyroid Endocrine Surgery, Department of Otolaryngology – Head and Neck Surgery, Massachusetts Eye and Ear Infirmary Harvard Medical School Boston Massachusetts USA
2. Department of Surgery International Goodwill Hospital Yokohama Japan
3. Department of Surgery Keio University School of Medicine Tokyo Japan
4. Department of Surgery International University of Health and Welfare, Atami Hospital Atami Japan
5. Department of Surgery Ito Hospital Tokyo Japan
6. Department of Surgery Gastroenterology Center International University of Health and Welfare, Mita Hospital Tokyo Japan
7. Department of Surgery Kitasato University School of Medicine Sagamihara Japan
8. Imperial College Healthcare NHS Trust London UK
9. Department of Surgery, Massachusetts General Hospital Harvard Medical School Boston Massachusetts USA