1. Department of Pain Management, West China Hospital of Sichuan University, Chengdu, Sichuan, China (mainland)
2. Department of Anesthesiology, West China Hospital of Sichuan University, Chengdu, Sichuan, China (mainland)
3. Department of Orthopedics, West China Hospital of Sichuan University, Chengdu, Sichuan, China (mainland)