1 Department of Anesthesiology, Critical Care and Pain Medicine, Boston Children's Hospital, Boston, MA, USA; Department of Psychiatry, Harvard Medical School, Boston, MA 02115, USA. Electronic address: sarah.nelson@childrens.harvard.edu.
2 Department of Anesthesiology, Perioperative and Pain Medicine, University of Calgary, Calgary, AB, Canada; Alberta Children's Hospital Research Institute, Calgary, AB, Canada; Hotchkiss Brain Institute, Calgary, AB, Canada; Owerko Centre, Calgary, AB, Canada.
3 Department of Anesthesiology, Perioperative and Pain Medicine, Stanford University, Palo Alto, CA, USA; Department of Rehabilitation Medicine, Maastricht University, Maastricht, Netherlands.
4 Department of Anesthesiology, Perioperative and Pain Medicine, Stanford University, Palo Alto, CA, USA.
5 Kelowna, BC, Canada.
6 Department of Psychology, University of Calgary, Calgary, AB, Canada; Alberta Children's Hospital Research Institute, Calgary, AB, Canada; Hotchkiss Brain Institute, Calgary, AB, Canada; Owerko Centre, Calgary, AB, Canada.