1. Division of Endocrinology and Diabetes, Department of Medicine, University of Minnesota, Minneapolis, Minnesota, USA.
2. Department of Medicine, University of Minnesota, Minneapolis, Minnesota, USA.
3. University of Minnesota Medical School, Minneapolis, Minnesota, USA.
4. Research Service, Minneapolis Veterans Affairs Health Care System, Minneapolis, Minnesota, USA.
5. Department of Pharmacy, Minneapolis Veterans Affairs Health Care System, Minneapolis, Minnesota, USA.
6. Department of Medicine, Minneapolis Veterans Affairs Health Care System, Minneapolis, Minnesota, USA.