University of Lagos - Department of Paediatrics, University of Lagos - Department of Paediatrics, University of Maiduguri - Department of Paediatrics, Alex Ekwueme Federal University - Department of Paediatrics, University of Nigeria - Department of Paediatrics, Maitama District Hospital - Department of Paediatrics, University of Ibadan - Department of Paediatrics, Ahmadu Bello University (ABU) - Department of Paediatrics, Federal Medical Centre Asaba, Federal Medical Centre Asaba - Department of Paediatrics, Lagos University Teaching Hospital - Department of Paediatrics, Lagos University Teaching Hospital - Department of Paediatrics, Institute of Cancer Research, Sutton - Insilico Unit, Cancer Therapeutic, Alex Ekwueme Federal University - Department of Paediatrics, Alex Ekwueme Federal University - Department of Paediatrics, Alex Ekwueme Federal University - Department of Paediatrics, Alex Ekwueme Federal University - Department of Community Medicine, Alex Ekwueme Federal University - Department of Paediatrics, University of Maiduguri - Department of Paediatrics, University College Hospital Ibadan - Department of Paediatrics, University College Hospital Ibadan - Department of Paediatrics, University College Hospital Ibadan - Department of Paediatrics, University College Hospital Ibadan - Department of Paediatrics, University of Lagos - Department of Paediatrics and Liverpool School of Tropical Medicine - Department of Clinical Sciences

National Hospital Abuja, Aminu Kano Teaching Hospital, Aminu Kano Teaching Hospital, Federal Medical Centre Asaba, Federal Medical Centre Asaba, Federal Medical Centre Asaba, Federal Medical Centre Asaba, University of Lagos - Department of Paediatrics, University of Lagos - Department of Paediatrics, Lagos University Teaching Hospital, University of Lagos - Department of Paediatrics, National Hospital Abuja, National Hospital Abuja, University of Benin - University of Benin Teaching Hospital, University of Benin - University of Benin Teaching Hospital, University of Nigeria - Department of Paediatrics, University of Nigeria, University of Nigeria, Indiana University Purdue University Indianapolis (IUPUI) - Indiana University School of Medicine and Indiana University Purdue University Indianapolis (IUPUI) - Indiana University School of Medicine