[1] Bedford VA Medical Center,Center for Health Quality, Outcomes and Economic Research (a VA Health Services Research and Development National Center of Excellence)
[2] Boston University School of Medicine,Division of General Internal Medicine
[3] Boston University School of Public Health,Health Policy and Management Department
[4] Philadelphia VAMC,CHERP
[5] University of Pennsylvania School of Medicine,Department of Internal Medicine
[6] Jesse Brown VAMC,undefined
[7] University of Illinois at Chicago,undefined
[8] St. Louis VAMC,undefined
[9] St. Louis University,undefined