1. Mount Sinai Hospital and University of Toronto, Toronto; Ontario Canada
2. Boston University School of Medicine; Boston Massachusetts
3. University of Texas M. D. Anderson Cancer Center; Houston
4. Brigham and Women's Hospital and Broad Institute; Boston Massachusetts
5. University Medical Center Utrecht; Utrecht The Netherlands
6. Massachusetts General Hospital; Boston
7. Brigham and Women's Hospital; Boston Massachusetts
8. University of Alabama at Birmingham
9. Cleveland Clinic; Cleveland Ohio
10. McMaster University, Hamilton; Ontario Canada
11. Hôpital Saint-Louis and Université Paris 7-Diderot; Paris France
12. Duke University Medical Center; Durham North Carolina
13. Johns Hopkins University; Baltimore Maryland
14. Mayo Clinic; Rochester Minnesota
15. Hospital for Special Surgery; New York New York
16. Brigham and Women's Hospital, Broad Institute, and Partners Center for Personalized Genetic Medicine; Boston Massachusetts
17. University of Manchester; Manchester UK
18. University of Texas M. D. Anderson Cancer Center, Houston, and Geisel School of Medicine at Dartmouth; Hanover New Hampshire
19. Boston University School of Medicine, Boston, Massachusetts, and University of Pennsylvania School of Medicine; Philadelphia
20. Mount Sinai Hospital Samuel Lunenfeld Research Institute, Toronto General Research Institute, and University of Toronto, Toronto; Ontario Canada