1. Epidemiologic Research and Information Center VA Puget Sound Health Care System Seattle Washington USA
2. Department of Medicine University of Washington School of Medicine Seattle Washington USA
3. Division of Endocrinology and Metabolism Department of Internal Medicine National Health Insurance Service Ilsan Hospital Goyang Republic of Korea
4. Department of Endocrinology and Metabolism Ajou University School of Medicine Suwon Korea
5. Hospital and Specialty Medicine Service VA Puget Sound Health Care System Seattle Washington USA
6. Division of Metabolism, Endocrinology and Nutrition Department of Medicine University of Washington School of Medicine Seattle Washington USA
7. Department of Anthropology University of Washington Seattle Washington USA