1. Department of Physical Medicine and Rehabilitation School of Medicine University of Hacettepe University Ankara Turkey
2. King Faisal Specialist Hospital and Research Centre Riyadh Kingdom of Saudi Arabia
3. Taichung Veterans General Hospital Taichung Taiwan
4. Department of Anaesthesiology Laboratory and Clinical Research Institute for Pain The University of Hong Kong Hong Kong China
5. I.M. Sechenov First Moscow State Medical University Moscow Russia
6. Eli Lilly and Co México City México
7. Seoul National University School of Medicine Pain Management Center of the Seoul National University Hospital Seoul Korea
8. Pain Clinic National Cancer Institute México DF México
9. Department of Orthopaedics Phramongkutklao Army Hospital Bangkok Thailand
10. Eli Lilly and Co Budapest Hungary
11. Huashan Hospital Fudan University Shanghai China