1. Institute for Global Health, University College London , 30 Guilford Street, London WC1N 1EH, United Kingdom
2. Department of Paediatrics, University of Ibadan , CW23+FJV University College Hospital, Queen Elizabeth I I Road, Agodi, Ibadan, Oyo 00285, Nigeria
3. Department of Global Public Health, Karolinska Institutet , Norrbackagatan 4, Stockholm 171 76, Sweden
4. Department of Community Medicine, University of Ibadan , CW22+H4W, Queen Elizabeth I I Road, Agodi, Ibadan, Oyo 200285, Nigeria
5. Save the Children , 1 St John’s Ln, London EC1M 4AR, United Kingdom
6. Save the Children International , Plot 773 Cadastral Zone B03, Wuye District, Ankuru 902101, Nigeria