1. Department of Medicine University of Chicago Chicago Illinois USA
2. Department of Medicine, Perelman School of Medicine University of Pennsylvania Philadelphia Pennsylvania USA
3. Department of Medicine University of California, San Francisco San Francisco California USA
4. Department of Medicine Icahn School of Medicine at Mount Sinai New York New York USA
5. Department of Medicine University of Arizona College of Medicine Phoenix Arizona USA
6. Department of Pediatrics University of California, San Diego San Diego California USA
7. Department of Medicine University of Colorado Aurora Colorado USA
8. Department of Medicine University of Cincinnati Cincinnati Ohio USA
9. Department of Medicine Massachusetts General Hospital Boston Massachusetts USA
10. Harvard Medical School Boston Massachusetts USA
11. Department of Medicine Beth Israel Deaconess Medical Center Boston Massachusetts USA