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