Arthritis, Psoriatic

• Research Site — Huntsville, Alabama, United States
• Research Site — Peoria, Arizona, United States
• Research Site — Phoenix, Arizona, United States
• Research Site — Santa Maria, California, United States

• 961 — Birmingham, Alabama, United States
• 953 — Tuscaloosa, Alabama, United States
• 954 — Peoria, Arizona, United States
• 971 — Scottsdale, Arizona, United States

• Prince of Wales Hospital — Hong Kong, China

• ULB Hopital Erasme, Service de Rheumatology — Brussels, Belgium
• UMHAT "Kaspela", EOOD — Plovdiv, Bulgaria
• MHAT - Ruse, AD — Rousse, Bulgaria
• UMHAT "SofiaMed", OOD, Block 1 — Sofia, Bulgaria

Not specified

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

Not specified

• Chru Besancon — Besançon, France

• Glendale, Arizona, United States
• Mesa, Arizona, United States
• Huntington Beach, California, United States
• Lakewood, California, United States

• Academic Medical Center Amsterdam — Amsterdam, North Holland, Netherlands