1. MD Anderson Cancer Center; Houston TX USA
2. Groupe Hospitalier Pitié-Salpêtrière; University Pierre and Marie Curie; Paris France
3. Karmanos Cancer Center; Detroit MI USA
4. Tom Baker Cancer Center; Calgary Canada
5. Fox Chase Cancer Center; Philadelphia PA USA
6. University of Rochester; Rochester NY USA
7. University of Nebraska Medical Center and Children's Hospital and Medical Center; Omaha NE USA
8. Vanderbilt-Ingram Cancer Center; Nashville TN USA