1. Department of Community MedicineUniversity College Hospital Ibadan Nigeria
2. Department of Community Medicine, College of MedicineUniversity of Ibadan Ibadan Nigeria
3. Department of Global Public HealthKarolinska Institute Stockholm Sweden
4. Centre for International Child HealthUniversity of MelbourneMelbourne VIC Australia
5. Department of PaediatricsUniversity College HospitalIbadan Nigeria
6. Department of Epidemiology and Medical Statistics, Faculty of Public Health, College of MedicineUniversity of IbadanIbadan Nigeria
7. Department of Health Promotion and Education, Faculty of Public Health, College of MedicineUniversity of Ibadan Ibadan Nigeria
8. Institute for Global HealthUniversity College London London UK
9. Eudowood Division of Respiratory SciencesJohns Hopkins School of MedicineBaltimore Maryland
10. Save the Children InternationalAbuja Nigeria
11. Save the Children UKLondon UK
12. Department of Paediatrics, College of MedicineUniversity of IbadanIbadan Nigeria