Vinay Kansal1, Michael Dollin2. 1. Faculty of Medicine (Kansal), University of Ottawa; University of Ottawa Eye Institute (Dollin); Ottawa Hospital Research Institute (Dollin), Ottawa, Ont. 2. Faculty of Medicine (Kansal), University of Ottawa; University of Ottawa Eye Institute (Dollin); Ottawa Hospital Research Institute (Dollin), Ottawa, Ont. mdollin@toh.ca.