1. From the Veterans Affairs Center for Practice Management and Outcomes Research (M.H., M.M.H., T.P.H., E.A.K.), VA Ann Arbor Health System, Ann Arbor, Mich; Department of Internal Medicine, University of Michigan (M.H., T.P.H., E.A.K.), Ann Arbor, Mich; Michigan Diabetes Research and Training Center (M.H., T.P.H., E.A.K.), Ann Arbor, Mich; Kaiser Permanente Northern California (J.A.S.), Oakland, Calif; and Center for Health Services Research (M.P.), Henry Ford Hospital, Detroit, Mich.