1. Department of Family Medicine, David Geffen School of Medicine at University of California, Los Angeles, Los Angeles, California (D.M.T.)
2. Division of General Internal Medicine and Health Services Research, Department of Medicine, David Geffen School of Medicine at University of California, Los Angeles, Los Angeles, California (N.S.W.)
3. Center for Community Health Integration and Departments of Family Medicine and Community Health, Population and Quantitative Health Sciences, Oncology, and Sociology, Case Western Reserve University, Cleveland, Ohio (K.C.S.).