1 Division of Ophthalmology, Groote Schuur Hospital, University of Cape Town, Cape Town, South Africa.
2 Department of Ophthalmology, Toronto Western Hospital, University Health Network, Toronto, Ont.
3 Department of Ophthalmology and Vision Sciences, University of Toronto, Toronto, Ont.; The Institute of Health Policy, Management and Evaluation, Dalla Lana School of Public Health, University of Toronto, Toronto, Ont.
4 Department of Ophthalmology, Toronto Western Hospital, University Health Network, Toronto, Ont.; Department of Ophthalmology and Vision Sciences, University of Toronto, Toronto, Ont.. Electronic address: efrem.mandelcorn@utoronto.ca.