1. Rush University Chicago Illinois
2. Hospital San Juan Batista Catamarca Argentina
3. Instituto Reumatologico Strusberg Cordoba Argentina
4. Universidad de Buenos Aires Buenos Aires Argentina
5. University of Puerto Rico San Juan Puerto Rico
6. Beaver Medical Group Redlands California
7. Loma Linda University Loma Linda California
8. University of Bologna Bologna Italy
9. National Institute of Arthritis and Musculoskeletal and Skin Diseases, NIH Bethesda Maryland
10. Gazi University Ankara Turkey
11. University of Montreal Montreal Quebec Canada
12. University of Santo Tomas Manila Philippines
13. Tuen Mun Hospital Hong Kong
14. Cedars Sinai Medical Center Los Angeles California
15. Cumming School of MedicineUniversity of Calgary Calgary Alberta Canada
16. University of Alabama at Birmingham