1. McGuire Veterans Affairs Medical Center and Virginia Commonwealth University School of Medicine; Richmond VA USA
2. American University of Beirut Medical Center; Beirut Lebanon
3. University of California, San Francisco; San Francisco CA USA
4. Loyola University of Chicago; Maywood IL USA
5. Mayo Clinic College of Medicine; Rochester MN USA
6. University of Michigan; Ann Arbor MI USA
7. University of Cambridge School of Clinical Medicine; Cambridge UK
8. MD Anderson Cancer Center; Houston TX USA
9. University of Chicago; Chicago IL USA
10. University of Pittsburgh; Pittsburgh PA USA
11. Duke University School of Medicine; Durham NC USA
12. University of Pennsylvania; Philadelphia PA USA
13. The Johns Hopkins Bayview Medical Center; Baltimore MD USA