Ankylosing Spondylitis

• Unita Operativa Semplice di Reumatologia — Catania, CT, Italy
• Arcispedale Sant'Anna — Ferrara, Italy
• U.O.S. Reumatologia - Azienda Ospedaliera Universitaria Policlinico Sant'Orsola-Malpighi — Bologna, Italy
• Piazzale Spedali Civili — Brescia, Italy

Not specified

• Universidade Federal de Sao Paulo — São Paulo, Brazil

• University Hospital Jean MINJOZ -Besançon — Besançon, France
• University hospital of Tours — Tours, France

• University of Sao Paulo — São Paulo, Brazil

• Department of Rheumatology, Sahlgrenska University Hospital — Gothenburg, Sweden

• Sahlgrenska University Hospital — Gothenburg, Sweden

• Desert Medical Imaging — Indian Wells, California, United States
• Desert Medical Advances — Palm Desert, California, United States
• Arthritis & Rheumatology Associates — Clearwater, Florida, United States
• Millennium Research — Ormond Beach, Florida, United States

• Vitebsk Regional Clinical Hospital — Vitebsk, Belarus
• Chelyabinsk Regional Clinical hospital — Chelyabinsk, Russia
• Research Institute of Rheumotology — Moscow, Russia
• Nizhegorodskaya Regional Clinical Hospital named after N.A. Semashko — N.Novgorod, Russia

• Instituto de Medicina Molecular — Lisbon, Portugal