1. Postgraduate student.
2. Associate Professor and Chief.
3. Research Assistant, Department of Emergency and General Dentistry, Stomatological College of Fourth Military Medical University, Xi'an, Shaanxi, China.
4. Associate Professor and Chief, Department of Anesthesiology, General Hospital of People's Liberation Army Chengdu Military Region, Chengdu, Sichuan, China.
5. Professor, Department of Anesthesiology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, China.