1 Clinical Sciences Department, Nigerian Institute of Medical Research, Lagos, Nigeria.
2 Washington University at St. Louis School of Medicine, St Louis, MO, USA.
3 Bethesda Home & School for the Blind, Lagos, Nigeria.
4 Columbia University Irving Medical Center, New York, NY, USA.
5 Institute for Global Health and Infectious Diseases, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA. [email protected].
6 Clinical Research Department, Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Diseases, London, UK. [email protected].