1 Department of Anesthesiology and Pain Medicine, University of Toronto, Toronto, ON, Canada. matteo.parotto@uhn.ca.
2 Department of Anesthesia and Pain Management, Toronto General Hospital, EN 429 - 200 Elizabeth Street, Toronto, ON, M5G 2C4, Canada. matteo.parotto@uhn.ca.
3 Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, ON, Canada. matteo.parotto@uhn.ca.
4 Independent statistician, Solagna, Italy.
5 Department of Anesthesiology and Pain Medicine, University of Ottawa, Ottawa, ON, Canada.
6 Clinical Epidemiology Program, Ottawa Hospital Research Institute, Ottawa, Canada.
7 Department of Anesthesiology and Pain Medicine, University of Toronto, Toronto, ON, Canada.
8 Department of Anesthesia and Pain Management, Toronto Western Hospital, Toronto, ON, Canada.