1. Department of Pediatrics, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada2Department of Clinical Epidemiology, Aarhus University Hospital, Aarhus, Denmark3Institute of Health Policy, Management, and Evaluation, University of Toronto, Toronto, Ontario, Canada4Center for Primary Care and Outcomes Research, Stanford University, Stanford, California5Clinical Excellence Research Center, Stanford University School of Medicine, Stanford, California
2. Department of Clinical Epidemiology, Aarhus University Hospital, Aarhus, Denmark
3. Institute of Health Policy, Management, and Evaluation, University of Toronto, Toronto, Ontario, Canada6St Michael’s Hospital Department of Medicine, University of Toronto, Toronto, Ontario, Canada
4. Center for Health and Community, University of California–San Francisco School of Medicine
5. Center for Primary Care and Outcomes Research, Stanford University, Stanford, California
6. Clinical Excellence Research Center, Stanford University School of Medicine, Stanford, California
7. Department of Clinical Epidemiology, Aarhus University Hospital, Aarhus, Denmark8Division of Epidemiology, Department of Health Research and Policy, Stanford University, Stanford, California