1. Department of Obstetrics and Gynaecology, Faculty of Medicine, College of Health Sciences, Nnamdi Azikiwe University, Awka, Nigeria
2. Department of Obstetrics and Gynaecology, Nnamdi Azikiwe University Teaching Hospital, Nnewi, Nigeria
3. Life International Hospital, Awka, Nigeria
4. Department of Anaesthesiology, Faculty of Medicine, College of Health Sciences, Nnamdi Azikiwe University, Awka, Nigeria
5. Department of Anaesthesiology, Nnamdi Azikiwe University Teaching Hospital, Nnewi, Nigeria