1. Southend University Hospital; Westcliff-on-Sea UK
2. Hôpital Lapeyronie; Montpellier France
3. Panorama Medical Centre; Cape Town South Africa
4. Schön-Klinik; Hamburg Germany
5. Hospital Heliópolis, Serviço de Reumatologia; Sao Paulo Brazil
6. Centre de Rhumatologie, St-Louis; Quebec Canada
7. University of Munich; Munich Germany
8. Université Catholique de Louvain and Cliniques Universitaires Saint-Luc; Brussels Belgium
9. Hospital del Salvador; Santiago Chile
10. Merck & Co., Inc.; Kenilworth New Jersey
11. Merck Sharpe & Dohme Italy; Rome Italy
12. Merck Sharpe & Dohme Belgium; Brussels Belgium