1 School of Medicine and Surgery, University of Milan-Bicocca, Monza, Italy.
2 Department of Emergency and Intensive Care, San Gerardo Hospital, Monza, Italy.
3 Departments of Critical Care Medicine, Keenan Research Centre for Biomedical Science, St Michael's Hospital, University of Toronto, Toronto, Canada. laffeyj@smh.ca.
4 Departments of Anesthesia and Physiology, University of Toronto, Toronto, Canada. laffeyj@smh.ca.
5 Interdepartmental division of Critical Care Medicine, University of Toronto, Toronto, Canada. laffeyj@smh.ca.
6 Departments of Critical Care Medicine, Keenan Research Centre for Biomedical Science, St Michael's Hospital, University of Toronto, Toronto, Canada.
7 Interdepartmental division of Critical Care Medicine, University of Toronto, Toronto, Canada.
8 Department of Medicine, University Health Network and Mount Sinai Hospital, Toronto, Canada.
9 Institute of Health Policy, Management and Evaluation, University of Toronto, Toronto, Canada.