1. Department of Obstetrics and Gynecology, Princess Christian Maternity Hospital (PCMH), University Teaching Hospitals Complex, University of Sierra Leone, Freetown, Sierra Leone
2. Center for Internal Medicine I, Department for Angiology, Medical School Brandenburg Theodor Fontane (MHB), Campus Brandenburg, Brandenburg, Germany
3. Department of Anesthesia, Princess Christian Maternity Hospital (PCMH), University Teaching Hospitals Complex, University of Sierra Leone, Freetown, Sierra Leone
4. Department of Obstetrics and Gynecology, College of Medicine, University of Lagos, Akoka, Lagos, Nigeria