1. Department of General Surgery, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215006, P.R. China
2. Department of Pathology, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215006, P.R. China
3. Department of Endocrinology, Suzhou Xiangcheng People's Hospital, Suzhou, Jiangsu 215131, P.R. China
4. Department of Thyroid and Breast Surgery, Ningbo First Hospital, Ningbo, Zhejiang 315010, P.R. China