1. Department of Thyroid Surgery, Fujian Medical University Union Hospital, Fuzhou, China.
2. 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.
3. Department of General Surgery, Zhangzhou Affiliated Hospital of Fujian Medical University, Zhangzhou, China.
4. College of Mathematics and Computer Science, Fuzhou University, Fuzhou, China.