1. Department of Paediatrics and Child Health, Obafemi Awolowo University, Ile Ife, Osun State, Nigeria.
2. Department of Surgery, Obafemi Awolowo University, Ile Ife, Osun State, Nigeria.
3. Department of Microbiology, Obafemi Awolowo University Teaching Hospitals Complex, Ile Ife, Osun State, Nigeria.