1. Paediatrics Department, Faculty of Medicine, Nnamdi Azikiwe University, Awka, Nigeria
2. Paediatrics Department, Nnamdi Azikiwe University Teaching Hospital, Nnewi, Nigeria
3. Community Medicine Department, Chukwuemeka Odumegwu Ojukwu University, Awka, Nigeria
4. Community Medicine Department, Chukwuemeka Odumegwu Ojukwu University Teaching Hospital, Awka, Nigeria
5. Haematology Department, Faculty of Medicine, Nnamdi Azikiwe University, Awka, Nigeria
6. Community Medicine Department, Faculty of Medicine, Nnamdi Azikiwe University, Awka, Nigeria