1. Department of Anesthesiology, The Affiliated Hospital, Southwest Medical University
2. Department of Pharmacology and Toxicology, University of Mississippi Medical Center, Jackson, MS
3. Department of Anesthesiology, Xuyong County People's Hospital
4. Department of Anesthesiology, The Second People’s Hospital of Guangyuan
5. Department of Anesthesiology, Guangyuan Mental Health Center
6. Department of Anesthesiology, The People’s Hospital of Yuechi
7. Department of Anesthesiology, Cangxi People's Hospital
8. Department of General Surgery (Thyroid Surgery), The Affiliated Hospital of Southwest Medical University