Children's Hospital of Eastern Ontario Research Institute, Ottawa, Ontario, Canada; University of Ottawa, Faculty of Medicine, Ottawa, Ontario, Canada; University of Ottawa, Faculty of Health Science, School of Human Kinetics, Ottawa, Ontario, Canada. Electronic address: plongmuir@cheo.on.ca. University of Toronto, Faculty of Medicine, Toronto, Ontario, Canada. Faculty of Medicine, McMaster University, Hamilton, Ontario, Canada; Department of Paediatrics, McMaster Children's Hospital, Hamilton, Ontario, Canada. Children's Hospital of Eastern Ontario Research Institute, Ottawa, Ontario, Canada. Faculty of Medicine, McMaster University, Hamilton, Ontario, Canada. Department of Paediatrics, McMaster Children's Hospital, Hamilton, Ontario, Canada. University of Ottawa, Faculty of Health Science, School of Human Kinetics, Ottawa, Ontario, Canada. Children's Hospital of Eastern Ontario Research Institute, Ottawa, Ontario, Canada; University of Ottawa, Faculty of Medicine, Ottawa, Ontario, Canada. Children's Hospital of Eastern Ontario Research Institute, Ottawa, Ontario, Canada; University of Ottawa, Faculty of Medicine, Ottawa, Ontario, Canada; Department of Paediatrics, Children's Hospital of Eastern Ontario, Ottawa, Ontario, Canada.