1. Department of Obstetrics and Gynecology, Faculty of Health Sciences, University of Buea, Buea, Cameroon
2. Department of Obstetrics and Gynecology, Douala General Hospital, Douala, Cameroon
3. Department of Anesthesiology and Reanimation, Douala General Hospital, Douala, Cameroon
4. Operating Theatre, Douala General Hospital, Douala, Cameroon
5. Department of Obstetrics and Gynecology, Faculty of Medicine and Biomedical Sciences, The University of Yaounde 1, Yaoundé, Cameroon