Scleroderma, Systemic

• ARCIM Institute — Filderstadt, Baden-Wurttemberg, Germany
• Universitätsklinikum Tuebingen, Abteilung Innere Medizin II — Tübingen, Baden-Wurttemberg, Germany

• University Medical Center Groningen — Groningen, Netherlands

Not specified

• University of Pennsylvania Health System — Philadelphia, Pennsylvania, United States

• Marmara University — Istanbul, Pendik, Turkey (Türkiye)

• Stanford University School of Medicine — Stanford, California, United States

• Azienda Ospedaliera, SSO respiratory pathophysiology Unit, Verona — Verona, Italy/Verona, Italy

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

Not specified

• PGIMER — Chandigarh, India