1. Department of General Surgery, The First Hospital of China Medical University, Shenyang, China
2. Department of Endocrinology and Metabolism, The First Hospital of China Medical University, Shenyang, China and Key Laboratory of Endocrine Diseases, Liaoning Province, Shenyang, China
3. Department of General Surgery, The First Hospital of China Medical University, Shenyang, China and Key Laboratory of Endocrine Diseases, Liaoning Province, Shenyang, China