1 The First Clinical School of Medicine, Guangdong Medical University, Zhan Jiang, Guangdong, China.
2 The First Clinical School of Medicine, Shenzhen University, Shenzhen, Guangdong, China.
3 Department of Thyroid and Breast Surgery, Union Shenzhen Hospital, Huazhong University of Science and Technology, Shenzhen, Guangdong, China. Electronic address: docctw@126.com.