1. Department of general surgery, The Second Affiliated Hospital of Fujian Medical University, Quanzhou, Fujian, China
2. Endocrine Department, The 180th Military Hospital of Chinese Peoples, Liberation Army, Quanzhou, Fujian, China
3. Endocrine Department, Affiliated Zhongshan Hospital of Guangdong Medical College, Zhongshan, Guangdong, China
4. Department of Pathology, The Second Affiliated Hospital of Fujian Medical University, Quanzhou, Fujian, China
5. Department of Pathology, Cancer Hospital of Shantou University Medical College, Shantou, Guangdong, China