1. Feinberg School of Medicine Northwestern University Chicago Illinois USA
2. MedStar Washington Hospital Center Georgetown University Washington District of Columbia USA
3. Trinity Health Ann Arbor Michigan USA
4. Albert Einstein Medical Center Philadelphia Pennsylvania USA
5. Mt Sinai Hospital Chicago Chicago Illinois USA
6. College of Medicine University of Ibadan Ibadan Nigeria
7. Illinois Masonic Medical Center Chicago Illinois USA
8. Department of Internal Medicine University Of Pittsburgh Medical Center Mckeesport Pennsylvania USA
9. Galter Health Sciences Library Feinberg School of Medicine Northwestern University Chicago Illinois USA