Scleroderma, Systemic

• Turku University Hospital, Turku PET Centre — Turku, Finland

• Shanghai ChangZheng hospital — Shanghai, Shanghai Municipality, China

• The First Affiliated Hospital of Bengbu Medical University — Bengbu, Anhui, China
• The First Affiliated Hospital of University of Science and Technology of China — Hefei, Anhui, China
• Peking University People's Hospital — Beijing, Beijing Municipality, China
• The First Affiliated Hospital of Xiamen University — Xiamen, Fujian, China

• Boston Children's Hospital — Boston, Massachusetts, United States

Not specified

• Renji Hospital Affiliated to Shanghai Jiao Tong University School of Medicine — Shanghai, Shanghai Municipality, China

• Medical University of South Carolina — Charleston, South Carolina, United States

• University of Alabama at Birmingham — Birmingham, Alabama, United States
• Banner - University Medicine Rheumatology Clinic — Phoenix, Arizona, United States
• Arizona Arthritis and Rheumatology Associates - Paradise Valley — Scottsdale, Arizona, United States
• University of California Los Angeles — Los Angeles, California, United States

• The Affiliated Hospital of Qingdao University — Qingdao, Qindao, Shandong, China

Not specified