1. Division of Health Policy and Outcomes Research, Department of Public Health Sciences, University of Rochester School of Medicine and Dentistry, Rochester, NY
2. Dow Division of Health Services Research, Department of Urology, University of Michigan Medical School, Ann Arbor, MI
3. Department of Orthopaedics, University of Rochester School of Medicine and Dentistry, Rochester, NY
4. Cardiovascular Division, Department of Medicine, Washington University School of Medicine
5. Center for Health Economics and Policy, Institute for Public Health at Washington University, St. Louis, MO
6. Department of Neurology, University of Rochester School of Medicine and Dentistry, Rochester, NY