1. From the Department of Internal Medicine, University of Michigan, Ann Arbor, MI (M.A.M.R., D.A.L., S.A.F., V.C., K.M.L.); Department of Pathology & Laboratory Medicine, University of Rochester Medical Center, Rochester, NY (N.B.); HSR&D Center for Clinical Management Research, Veterans Affairs Ann Arbor Healthcare System (D.A.L., K.M.L.); and Institute for Social Research, University of Michigan, Ann Arbor, MI (K.M.L.).