1. Rush University Medical Center, Chicago, IL, USA
2. Northwestern University, Chicago, IL, USA
3. University of Pittsburgh Medical Center, Pittsburgh, PA, USA
4. University of Pittsburgh, Pittsburgh, PA, USA
5. Mount Sinai Hospital, New York, NY, USA
6. Icahn School of Medicine at Mount Sinai, New York, NY, USA
7. Duke University Medical Center, Durham, NC, USA
8. Springfield Clinic, LLP, Springfield, IL, USA
9. Southern Illinois University, Springfield, IL, USA
10. Loma Linda University, Loma Linda, CA, USA
11. University of Virginia, Charlottesville, VA, USA
12. Medstar Union Memorial Hospital, Baltimore, MD, USA
13. Johns Hopkins Medical Institutions, Baltimore, MD, USA
14. Kansas University Medical Center, Kansas City, KS, USA
15. Toronto Western Hospital, Toronto, Ontario, Canada
16. Cleveland Clinic, Cleveland, OH, USA
17. Columbia University, New York, NY, USA
18. New York-Presbyterian/The Allen Hospital, New York, NY, USA