Vinay Kansal1, Ehsan Rahimy2, Sunir Garg3, Michael Dollin4. 1. University of Ottawa, Faculty of Medicine, Ottawa, Ont. 2. Palo Alto Medical Foundation, Palo Alto, Cal. 3. The Retina Service of Wills Eye Hospital, Philadelphia, Penn. 4. University of Ottawa Eye Institute, Ottawa Hospital Research Institute, Ottawa, Ont. Electronic address: mdollin@toh.ca.