High-Grade Glioma (HGG)

• University of Alabama at Birmingham, Children's of Alabama — Birmingham, Alabama, United States
• Children's Hospital Los Angeles — Los Angeles, California, United States
• University of California, San Diego Rady Children's Hospital — San Diego, California, United States
• University of California, San Francisco — San Francisco, California, United States

• Hospital Universitari Vall D Hebron — Barcelona, Catalonia, Spain

• Hospital Universitario Vall d'Hebron — Barcelona, Spain
• Hospital HM Sanchinarro — Madrid, Spain
• Complejo Hospitalario Universitario de Santiago — Santiago de Compostela, Spain

Not specified