1. Department of Surgical Day Ward, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, China
2. Department of Thyroid Surgery, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, China
3. Department of Pathology, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, China
4. Department of Endocrinology, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, China