Hayden B Bosworth1, Matthew J Crowley2. 1. Durham VA Medical Center, Center for Health Services Research in Primary Care, Durham, North Carolina, USA; Division of General Internal Medicine, Department of Medicine, Duke University, Durham, North Carolina, USA; 2. Durham VA Medical Center, Center for Health Services Research in Primary Care, Durham, North Carolina, USA; Division of Endocrinology, Diabetes and Metabolism, Department of Medicine, Duke University, Durham, North Carolina, USA.