1. Tufts Medical Center , Boston, Massachusetts , USA
2. University of Alabama at Birmingham , Birmingham, Alabama , USA
3. Larner College of Medicine, University of Vermont , Burlington, Vermont , USA
4. University of Vermont Medical Center , Burlington, Vermont , USA
5. Zuckerberg San Francisco General Hospital , San Francisco, California , USA
6. University of California , San Francisco, California , USA
7. Yale School of Medicine , New Haven, Connecticut , USA
8. Yale University School of Public Health , New Haven, Connecticut , USA
9. Yale New Haven Hospital , New Haven, Connecticut , USA
10. Montefiore Medical Center , Bronx, New York , USA
11. Albert Einstein College of Medicine , Bronx, New York , USA
12. University of Chicago , Chicago, Illinois , USA
13. Tufts University School of Medicine , Boston, Massachusetts , USA
14. Maine Medical Center Research Institute , Portland, Maine , USA
15. Maine Medical Center , Portland, Maine , USA
16. Maine Medical Partners Adult Infectious Diseases , South Portland, Maine , USA
17. University of Colorado School of Medicine , Denver, Colorado , USA
18. University of Texas Southwestern Medical Center , Dallas, Texas , USA
19. Washington University in St. Louis School of Medicine , St. Louis, Missouri , USA