From the Department of Ophthalmology (Srinivasan
McAllum, Slomovic), Toronto Western Hospital; Department of Ophthalmology and Vision Sciences (Srinivasan, McAllum, Slomovic); Department of Microbiology (Poutanen), Toronto Medical Laboratories, Mount Sinai Hospital; Department of Laboratory Medicine and Pathobiology and Department of Medicine (Poutanen), University of Toronto, Toronto, Canada