1. Department of Medicine, Brigham and Women's Hospital , Boston, MA 02115 , USA
2. Harvard Medical School , Boston, MA 02115 , USA
3. Department of Medicine, Harbor-UCLA Medical Center, Torrance, CA 90502, USA
4. Department of Medicine, Rhode Island Hospital , Providence, RI 02903 , USA
5. Warren Alpert Medical School of Brown University , Providence, RI 02912 , USA
6. Joslin Diabetes Center , Boston, MA 02215 , USA
7. Department of Medicine, Beth Israel Deaconess Medical Center, Boston, MA 02215, USA
8. State University of New York Upstate Medical University , Syracuse, NY 13210 , USA