[1] Ann Arbor VA Center for Practice Management and Outcomes Research,the Health Services Research and Development Field Program
[2] University of Michigan Medical School,the Department of Internal Medicine
[3] University of North Carolina Schools of Medicine and Public Health,the Department of Medicine and Department of Health Behavior and Health Education
[4] University of North Carolina School of Medicine,the Division of Health Professions and Primary Care, Sheps Center
[5] University of Wisconsin-Madison School of Medicine,the Department of Medicine
[6] University of Michigan Health System,undefined