Purpura

• Research Site — Orange, California, United States
• Research Site — San Diego, California, United States
• Research Site — Washington D.C., District of Columbia, United States
• Research Site — Atlanta, Georgia, United States

• Weill Cornell Medical College — New York, United States

• CHRU de Brest — Brest, France

• Canberra Hospital — Canberra, Australian Capital Territory, Australia
• Royal Prince Alfred Hospital — Sydney, New South Wales, Australia
• St George Hospital — Sydney, New South Wales, Australia
• Princess Alexandra Hospital — Brisbane, Queensland, Australia

• Research Site — New York, United States
• Research Site — Cleveland, Ohio, United States

• Chungnam National University Hospital — Daejeon, South Korea
• Daegu Catholic University Medical Center — Deagu, South Korea
• Chonnam National University Hwasun Hospital — Hwasun, South Korea
• Gachon University Gil Medical Center — Incheon, South Korea

• Roosevelt Hospital — New York, United States

Not specified

• Hospital for Sick Children — Toronto, Ontario, Canada

• New York Presbyterian Hospital — New York, United States