1. Temple University; Philadelphia PA USA
2. Johns Hopkins University; Baltimore MD USA
3. University of Michigan; Ann Arbor MI USA
4. Mayo Clinic; Rochester MN USA
5. Wake Forest University; Winston-Salem NC USA
6. California Pacific Medical Center; San Francisco CA USA
7. University of Louisville; Louisville KY USA
8. Texas Tech University; El Paso TX USA
9. Stanford University; Palo Alto CA USA
10. National Institute of Diabetes and Digestive and Kidney Diseases; Bethesda MD USA