1. Department of Ophthalmology and Vision Sciences, University of Toronto, Toronto, Ontario, Canada
2. Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada
3. Department of Anesthesia, University of Toronto, Toronto, Ontario, Canada
4. Institute for Better Health, Trillium Health Partners, Mississauga, Ontario, Canada
5. Department of Statistics and Quantitative Methods, University of Milano-Bicocca, Milano, Italy