1. Department of Pain Management, Tianjin First Center Hospital, Tianjin, China
2. Department of Anesthesiology, Tianjin Medical University NanKai Hospital, Tianjin, China
3. School of the Fourth Clinical Medicine, Capital Medical University, Beijing, China
4. Department of Pain Management, Hospital Affiliated 5 to Nantong University (Taizhou People’s Hospital), Taizhou, China