1. Department of Pediatrics, Bayero University Kano, Nigeria & Visiting Consultant John Kennedy Medical Center Monrovia, Liberia
2. Department of Medicine, Ahmadu Bello University Teaching Hospital Zaria, Nigeria & Visiting Consultant John F Kennedy Medical Center Monrovia, Liberia
3. Department of Pediatrics, John F. Kennedy Medical Center Monrovia, JFK Hospital, Monrovia, Liberia
4. Department of Medicine, Yale School of Medicine, New Haven, CT, USA