1. Arthritis and Clinical Immunology Research Program; Oklahoma Medical Research Foundation; Oklahoma City OK 73104 USA
2. Center for Public Health Genomics and Department of Biostatistical Sciences; Wake Forest University Health Sciences; Winston-Salem NC 27157-106 USA
3. Division of Rheumatology, Department of Medicine; University of California Los Angeles; Los Angeles CA 90095 USA
4. Department of Rheumatology; Hanyang University Hospital for Rheumatic Diseases; Seoul 133-792 Republic of Korea
5. Department of Pathology; University of Oklahoma Health Sciences Center; Oklahoma City OK 73014 USA
6. Kyungpook National University Hospital; Daegu 700-721 Republic of Korea
7. Ajou University Hospital; Suwon 443-380 Republic of Korea
8. Dong-A University Hospital; Busan 602-715 Republic of Korea
9. Department of Internal Medicine; Yonsei University College of Medicine; Seoul 120-749 Republic of Korea
10. Department of Internal Medicine; Catholic University of Daegu School of Medicine; Daegu 705-718 Republic of Korea
11. Daejeon Rheumatoid & Degenerative Arthritis Center; Chungnam National University Hospital; Daejeon 305-764 Republic of Korea
12. Korea National Institute of Health; Osong 361-709 Republic of Korea
13. Shanghai Institute of Rheumatology, Renji Hospital; Shanghai China 200001
14. Shanghai JiaoTong University School of Medicine; Shanghai China 200025
15. Department of Rheumatology; Allergy and Immunology, Tan Tock Seng Hospital; Singapore 308433
16. University of Texas Southwestern Medical Center; Dallas TX 75390 USA
17. Department of Internal Medicine; Seoul National University Hospital; 101, Daehak-ro Jongno-gu Seoul 110-744 Republic of Korea
18. Centro de Genomica e Investigaciones Oncológicas; Pfizer-Universidad de Granada-Junta de Andalućıa; Granada 18100 Spain
19. Rosalind Russell/Ephraim P. Engleman Rheumatology Research Center; University of California San Francisco; San Francisco CA 94117 USA
20. Department of Medicine; University of Southern California; Los Angeles CA 90095
21. Department of Medicine, Division of Clinical Immunology and Rheumatology; University of Alabama at Birmingham; Birmingham AL 35294 USA
22. Divisions of Genetics and Molecular Medicine and Immunology, Infection and Inflammatory Disease; King's College London; London UK WC2R 2LS
23. Division of Rheumatology; Cincinnati Children's Hospital Medical Center; Cincinnati OH 45229 USA
24. US Department of Veterans Affairs Medical Center; Cincinnati OH 45220 USA