1. Cardiovascular Surgery Department, The Second Hospital of Jilin University, Changchun, China.
2. Department of Ophthalmology, First Hospital of Jilin University, Changchun, China.
3. Bethune First College of Clinical Medicine, Jilin University, Changchun, China.
4. Department of Cancer Center, The First Hospital of Jilin University, Changchun, China.
5. Bethune Second College of Clinical Medicine, Jilin University, Changchun, China.
6. Bethune Third College of Clinical Medicine, Jilin University, Changchun, China.
7. Department of Gastrointestinal Surgery, The Second Hospital of Jilin University, Changchun, China.