1. Department of Hepatobiliary Surgery, First Affiliated Hospital, Medical College, Xi'an Jiaotong University, Xi'an, China.
2. Heart Center, Northwest Women's and Children's Hospital, Xi'an, China.
3. Department of Endocrinology, First Affiliated Hospital, Medical College, Xi'an Jiaotong University, Xi'an, China.
4. Institute of Advanced Surgical Technology and Engineering, Xi'an Jiaotong University, Xi'an, China.