Zeming Liu1, Tao Huang2. 1. Department of Breast and Thyroid Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, China; Division of Endocrinology and Metabolism, Johns Hopkins University School of Medicine, Baltimore, MD, USA. 2. Department of Breast and Thyroid Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, China. Electronic address: huangtaowh@163.com.