Neoplasms, Unknown Primary

• University of Illinois Cancer Center — Chicago, Illinois, United States
• Veterans Affairs Medical Center - Chicago Westside Hospital — Chicago, Illinois, United States
• Decatur Memorial Hospital Cancer Care Institute — Decatur, Illinois, United States
• Hinsdale Hematology Oncology Associates — Hinsdale, Illinois, United States

• University of Chicago Comprehensive Cancer Center — Chicago, Illinois, United States
• Evanston CCOP-NorthShore University HealthSystem — Evanston, Illinois, United States

• Rigshospitalet — Copenhagen, Denmark
• Institut Gustave Roussy — Villejuif, Val De Marne, France
• Viecuri Medical Centre Venlo — Venlo, Netherlands

• Universitaetsspital-Basel — Basel, Switzerland
• Istituto Oncologico della Svizzera Italiana - Ospedale San Giovanni — Bellinzona, Switzerland
• Inselspital Bern — Bern, Switzerland
• Spital Buelach — Bülach, Switzerland

Not specified

• Albert Einstein Comprehensive Cancer Center — The Bronx, New York, United States

• Foundation Medicine, Inc — Cambridge, Massachusetts, United States

• University of Alabama at Birmingham Comprehensive Cancer Center — Birmingham, Alabama, United States
• Comprehensive Cancer Institute — Huntsville, Alabama, United States
• MBCCOP - Gulf Coast — Mobile, Alabama, United States
• Montgomery Cancer Center — Montgomery, Alabama, United States

• Wake Forest University Comprehensive Cancer Center — Winston-Salem, North Carolina, United States

• St. Jude Children's Research Hospital — Memphis, Tennessee, United States