1. Department of Child Health, University of Ghana Medical School
2. Department of Biostatistics, School of Public Health, University of Ghana, Legon
3. Department of Immunology, Noguchi Memorial Institute for Medical Research, University of Ghana
4. Princess Marie Louise Children's Hospital
5. Department of Epidemiology and Disease Control, School of Public Health, College of Health Sciences, University of Ghana
6. Boston University Chobanian and Avedisian School of Medicine, Boston
7. Department of Population, Family and Reproductive Health, School of Public Health, College of Health Sciences, University of Ghana Legon