[1] University of Toronto,University Health Network Research Institute and Department of Health Policy Management and Evaluation
[2] Hannover Medical School,Health Services Research Unit, Department of Rheumatology, Center of Internal Medicine
[3] Roche Pharmaceuticals,Health Economics Department
[4] Hoffman-La Roche Pharmaceuticals,Medical Outcomes Research and Economics, Medical Science Department
[5] University of Virginia School of Medicine,Department of Health Evaluation Sciences
[6] Toronto General Research Institute,Division of Clinical Decision Making