Institution: | (1) Department of Clinical Epidemiology and Biostatistics, Faculty of Health Sciences, McMaster University and St. Joseph's Health System Research Network, Hamilton, ON, Canada;(2) Department of Pediatrics/Adolescent Medicine, University of California, San Francisco, CA, USA;(3) Department of Pediatrics, University of Connecticut Health Center and Connecticut. Children's Medical Center, Hartford, CT, USA;(4) Occupational and Preventive Medicine, Meharry Medical College, Nashville, TN, USA;(5) Center for Outcomes and Effectiveness Research, Agency for Healthcare Research and Quality, Rockville, MD, USA |