1. Massachusetts General Hospital, Boston;
2. Memorial Sloan-Kettering Cancer Center, New York, NY;
3. University of Virginia, Charlottesville;
4. San Raffaele Hospital Scientific Institute, Milan, Italy;
5. St Bartholomew's Hospital, London, United Kingdom;
6. Princess Margaret Hospital, Toronto, ON;
7. Charité-Campus Benjamin Franklin, Berlin, Germany;
8. Hospital Clinic, Barcelona, Spain;
9. Augusta-Kranken-Anstalt, Bochum, Germany;
10. University Hospital Freiburg, Freiburg, Germany;
11. Albany Medical Center, NY;
12. Dana-Farber Cancer Institute, Boston, MA; and
13. Medical College of Georgia, Augusta