1. Arthritis and Clinical Immunology Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, USA
2. Cincinnati Children's Hospital Medical Center and the US Department of Veterans Affairs Medical Center, Cincinnati, OH, USA
3. Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX, USA
4. Department of Rheumatology, Hanyang University Hospital for Rheumatic Diseases, Seoul, Korea
5. Kyungpook National University Hospital, Daegu, Korea
6. Ajou University Hospital, Suwon, Korea
7. Dong-A University Hospital, Busan, Korea
8. Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea
9. Daegu Catholic University Hospital, Daegu, Korea
10. Daejeon Rheumatoid & Degenerative Arthritis Center, Chungnam National University Hospital, Daejeon, Korea
11. Chonnam National University Hospital, Gwangju, Korea
12. Korea National Institute of Health, Osong, Korea
13. Division of Rheumatology, Department of Medicine, Penn State Medical School, PA, USA
14. Rheumatic Diseases Division, Department of Medicine, University of Texas Southwestern Medical Center, TX, USA
15. Sanatorio Parque, Rosario, Argentina
16. Howard Hughes Medical Institute, Janelia Farm Research Campus, Ashburn, VA, USA