1. Department of Pain Management, Huadong Hospital Affiliated to Fudan University, Shanghai, China
2. Department of Pain Management, Peking University People’s Hospital, Beijing, China
3. Department of Pain Management, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
4. Department of Pain Management, the First Affiliated Hospital, Zhejiang University, Hangzhou, China
5. Department of Pain Management, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, China
6. Department of Pain Management, Xinhua Hospital of Pingdingshan, Pingdingshan, China
7. Department of Pain Management, The 2nd Affiliated Hospital of Harbin Medical University, Harbin, China
8. Department of Pain Management, Army Medical University Southwest Hospital, Chongqing, China
9. Department of Pain Management, The First Affiliated Hospital of Soochow University, Soochow, China
10. Department of Pain Management, Beijing Tian Tan Hospital, Capital Medical University, Beijing, China