Affiliation: | 1. Center for Health Services Research in Primary Care, Durham VAMC, Durham, North Carolina;2. Real World Evidence and Epidemiology, GlaxoSmithKline, Collegeville, Pennsylvania;3. Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, North Carolina;4. Department of Medicine, Division of Endocrinology and Metabolism, University of North Carolina, Chapel Hill, North Carolina |