1 Department of Ophthalmology and Vision Sciences, Faculty of Medicine, The University of Toronto, Toronto, Ontario, Canada. helen.dimaras@sickkids.ca.
2 Division of Clinical Public Health, Dalla Lana School of Public Health, The University of Toronto, Toronto, Ontario, Canada. helen.dimaras@sickkids.ca.
3 Department of Ophthalmology and Vision Sciences, The Hospital for Sick Children, Toronto, Ontario, Canada. helen.dimaras@sickkids.ca.
4 Child Health Evaluative Sciences Program, SickKids Research Institute, Toronto, Ontario, Canada. helen.dimaras@sickkids.ca.
5 Centre for Global Child Health, SickKids Research Institute, Toronto, Ontario, Canada. helen.dimaras@sickkids.ca.
6 Department of Human Pathology, University of Nairobi, Nairobi, Kenya.
7 KAVI Institute of Clinical Research, Nairobi, Kenya.
8 Department of Biochemistry, University of Nairobi, Nairobi, Kenya.
9 Directorate of Research and Innovation, Mount Kenya University, Thika, Kenya.
10 Department of Pediatrics and Child Health, University of Nairobi, Nairobi, Kenya.
11 Pumwani Maternity Hospital, Nairobi City County Medical Services, Nairobi, Kenya.
12 Scientific Ethics Review Unit, Kenya Medical Research Institute, Nairobi, Kenya.
13 Department of Ophthalmology, University of Nairobi, Nairobi, Kenya.
14 Kenyatta National Hospital, Nairobi, Kenya.
15 Department of Medical Microbiology and Immunology, University of Nairobi, Nairobi, Kenya.
16 Department of Ophthalmology, University of Nairobi, Nairobi, Kenya. drnjambi@uonbi.ac.ke.
17 Kenyatta National Hospital, Nairobi, Kenya. drnjambi@uonbi.ac.ke.