1 Department of Critical Care Medicine, Department of Anesthesiology and Pain Medicine, and the Dosseter Ethics Centre, University of Alberta, Edmonton, AB, Canada. peter.brindley@albertahealthservices.ca.
2 Faculty of Nursing, Royal Alexandra Hospital, Edmonton, AB, Canada.
3 Department of Anaesthesia and Intensive Care, Nottingham University Hospitals, Nottingham, UK.
4 Division of Pediatric Critical Care, Stollery Children's Hospital, Edmonton, AB, Canada.