Myxofibrosarcoma

• Children's Healthcare of Atlanta — Atlanta, Georgia, United States
• Lurie Children's Hospital of Chicago — Chicago, Illinois, United States
• Our Lady of the Lake Children's Hospital — Baton Rouge, Louisiana, United States
• Dana Farber Cancer Institute — Boston, Massachusetts, United States

• Memorial Sloan Kettering Basking Ridge (Limited protocol activities) — Basking Ridge, New Jersey, United States
• Memorial Sloan Kettering Monmouth (Limited protocol activities) — Middletown, New Jersey, United States
• Memorial Sloan Kettering Bergen (Limited Protocol Activities) — Montvale, New Jersey, United States
• Memorial Sloan Kettering Cancer Center @ Suffolk - Commack (Limited Protocol Activities) — Commack, New York, United States

• Haukeland University Hospital — Bergen, Norway
• Oslo University Hospital — Oslo, Norway

Not specified

• Children's Hospital of Alabama — Birmingham, Alabama, United States
• University of Alabama at Birmingham Cancer Center — Birmingham, Alabama, United States
• The Kirklin Clinic at Acton Road — Birmingham, Alabama, United States
• Anchorage Associates in Radiation Medicine — Anchorage, Alaska, United States

• The University of Arizona Cancer Center — Tucson, Arizona, United States
• Children's Hospital Los Angeles — Los Angeles, California, United States
• USC Norris Comprehensive Cancer Center — Los Angeles, California, United States
• Tower Hematology Oncology Medical Group — Los Angeles, California, United States

• Memorial Sloan Kettering Cancer Center — New York, United States

• Washington University School of Medicine — St Louis, Missouri, United States

• OHSU Knight Cancer Institute — Portland, Oregon, United States

• Mayo Clinic in Arizona — Scottsdale, Arizona, United States
• The Medical Center of Aurora — Aurora, Colorado, United States
• Boulder Community Hospital — Boulder, Colorado, United States
• Rocky Mountain Cancer Centers-Boulder — Boulder, Colorado, United States