1. Department of Anaesthesia & Intensive Care, Faculty of Clinical Sciences, Obafemi Awolowo University, Ile-Ife, Nigeria
2. Department of Otorhinolaryngology, Faculty of Clinical Sciences, Obafemi Awolowo University, Ile-Ife, Nigeria
3. Department of Anaesthesia & Intensive Care, Obafemi Awolowo University Teaching Hospitals Complex, Ile-Ife, Nigeria
4. Department of Anesthesiology & Pain Management, University of Texas Southwestern Medical Center, Dallas, TX, USA
5. Department of Obstetrics & Gynaecology, Obafemi Awolowo University Teaching Hospitals Complex, Ile-Ife, Nigeria