| Affiliation: | 1. Department of Epidemiology, Brown University School of Public Health, Brown University, Providence, Rhode Island, USA;2. Department of Environmental Health, University of Cincinnati, Cincinnati, Ohio, USA;3. Centers for Disease Control and Prevention, Atlanta, Georgia, USA;4. Child and Family Research Institute, BC Children's and Women's Hospital, Vancouver, British Columbia, Canada;5. Faculty of Health Sciences, Simon Fraser University, Burnaby, Canada;6. Division of Biostatistics and Epidemiology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA |
