1. Department of Ophthalmology and Visual Science, University of Chicago, Chicago, Illinois, USA
2. Department of Ophthalmology and Vision Science, University of Toronto, Toronto, Canada
3. Department of Ophthalmology and Visual Sciences, University of Illinois at Chicago, Chicago, Illinois, USA
4. Kansas City University of Medicine and Biosciences, Kansas City, Missouri, USA
5. Division of Infectious Diseases, Department of Medicine, University of Toronto, Toronto, Canada
6. Tropical Disease Unit, Toronto General Hospital, Toronto, Canada
7. Public Health Ontario Laboratory, Public Health Ontario, Toronto, Canada