1 Department of Anesthesiology, Critical Care, and Pain Medicine, Boston Children's Hospital & Harvard Medical School, Boston, MA, and Department of Neurology, Boston Children's Hospital & Harvard Medical School, Boston, MA.
2 Department of Emergency Medicine, British Columbia Children's Hospital, Vancouver, BC, Canada.
3 Pediatric Intensive Care and Neonatal Medicine, Paris South University Hospitals-Assistance Publique Hopitaux de Paris, Paris, France.
4 Department of Anesthesiology and Critical Care, Children's Hospital of Philadelphia, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA.
5 UCL Great Ormond Street Institute of Child Health, NIHR Biomedical Research Centre, London, United Kingdom.