Ankylosis

• ULB Hopital Erasme, Service de Rheumatology — Brussels, Belgium
• Eurohospital — Plovdiv, Bulgaria
• UMHAT Kaspela EOOD — Plovdiv, Bulgaria
• Medical Center "Teodora", EOOD — Rousse, Bulgaria

• Martina Hansens Hospital AS — Bærum, Norway
• Diakonhjemmet Hospital AS — Oslo, Norway
• University Hospital of North Norway — Tromsø, Norway
• University of Gotenburg — Gothenburg, Sweden

Not specified

• Rheumatology Department, the Third Affiliated Hospital of Sun Yat-sen University — Guangzhou, Guangdong, China

• Academic Medical Center — Amsterdam, Netherlands
• Ziekenhuis Bernhoven — Uden, Netherlands

Not specified

Not specified

• 7 — Los Angeles, California, United States
• 1 — Chapel Hill, North Carolina, United States
• 3 — Durham, North Carolina, United States
• 500 — Maastricht, Netherlands

• North-Western State Medical University n.a. I.I.Mechnikov — Saint Petersburg, Russia

Not specified