1. Metroplex Clinical Research Center; Dallas Texas
2. University of Colorado; Denver
3. Leiden University Medical Center, Leiden, The Netherlands, and Imaging Rheumatology BV; Meerssen The Netherlands
4. Unidad de Investigacion en Enfermedades Cronico-Degenerativas; Guadalajara Mexico
5. Centro Medico Privado de Reumatologia; Tucuman Argentina
6. Scientific Research Institute of Rheumatology, Russian Academy of Medical Sciences; Moscow Russia
7. Centro Paulista de Investigação Clinica; São Paulo Brazil
8. Eli Lilly and Company; Indianapolis Indiana
9. Keio University School of Medicine; Tokyo Japan