1. Department of Medicine; Imperial College London; London United Kingdom
2. Division of Computational and Systems Medicine, Department of Surgery and Cancer; Imperial College London; London United Kingdom
3. Medical Research Council (The Gambia Unit); Fajara Gambia
4. Department of Medicine; Jos University Teaching Hospital, Plateau State; Nigeria Banjul Gambia
5. Royal Victoria Teaching Hospital, Independence Drive; Banjul Gambia