1. Rainier Clinical Research Center, Renton, Washington, USA.
2. Barbara Davis Center for Diabetes, Aurora, Colorado, USA.
3. Iowa Diabetes and Endocrinology Center, West Des Moines, Iowa, USA.
4. Medical Investigations, Inc., Little Rock, Arkansas, USA.
5. AM Diabetes and Endocrinology Center, Bartlett, Tennessee, USA.
6. Atlanta Diabetes Associates, Atlanta, Georgia, USA.
7. AMCR Institute, Escondido, California, USA.
8. Metabolic Research Institute, Inc., West Palm Beach, Florida, USA.
9. Diabetes and Endocrinology Consultants of Pennsylvania, Feasterville Trevose, Pennsylvania, USA.
10. Mayo Clinic, Rochester, Minnesota, USA.
11. SoCal Diabetes, Torrance, California, USA.
12. Grunberger Diabetes Institute, Bloomfield Hills, Michigan, USA.
13. Endocrine Research Solutions, Roswell, Georgia, USA.
14. Medtronic, Northridge, California, USA.
15. Stanford University School of Medicine, Palo Alto, California, USA.