1. University of Michigan; Ann Arbor; Michigan; USA
2. Johns Hopkins University; Baltimore; Maryland; USA
3. Temple University; Philadelphia; Pennsylvania; USA
4. Wake Forest University; Winston-Salem; North Carolina; USA
5. University of Mississippi; Jackson; Mississippi; USA
6. Stanford University; Palo Alto; California; USA
7. California Pacific Medical Center; San Francisco; California; USA
8. Texas Tech University Health Sciences Center; El Paso; Texas; USA
9. Mayo Clinic; Rochester; Minnesota; USA
10. National Institute of Diabetes and Digestive and Kidney Diseases; Bethesda; Maryland; USA