Skin Diseases, Vascular

• University of South Florida Data Management Coordinating Center — Tampa, Florida, United States

• University of South Florida Data Management Coordinating Center — Tampa, Florida, United States

• Cologne, North Rhine-Westphalia, Germany

• United States, Arizona — Scottsdale, Arizona, United States
• United States, California — Granada Hills, California, United States
• United States, California — Los Angeles, California, United States
• United States, California — Redding, California, United States

• Emory University — Atlanta, Georgia, United States

• Department of Rheumatology, Clinical Immunology and Allergology, Bern University Hospital — Bern, Canton of Bern, Switzerland

• National Institutes of Health Clinical Center, 9000 Rockville Pike — Bethesda, Maryland, United States

• Medellin — Medellín, Antioquia, Colombia

• Illkirch-Graffenstaden, France
• Strasbourg, France

Not specified