1. Department of Anesthesia
2. Shaanxi People's Hospital
3. Xi'an 710068
4. China
5. School of Resource and Environmental Science
6. Wuhan University
7. Wuhan 430079
8. Department of Orthopedics
9. Renmin Hospital of Wuhan University
10. Wuchang 430060
11. Department of Cardiology
12. Xijing Hospital
13. Fourth Military Medical University
14. Xi'an 710032
15. Department of Anesthesiology
16. School of Stomatology