1 From the Department of Anesthesia, the Hospital for Sick Children, Toronto, Ontario, Canada.
2 Department of Anesthesiology and Pain Medicine, University of Toronto, Toronto, Ontario, Canada.
3 Department of Medical and Surgical Sciences (DIMEC), University of Bologna, Bologna, Italy.
4 Department of Anesthesiology, Perioperative Medicine and Pain Management, College of Medicine, University of Saskatchewan, Saskatoon, Saskatchewan, Canada.