1. Department of Obstetrics and Gynecology, Faculty of Medicine, University of Lubumbashi, Lubumbashi, Democratic Republic of the Congo
2. Department of Epidemiology, School of Public Health, University of Goma, Goma, Democratic Republic of the Congo
3. Department of Maternal and Child Health, School of Public Health, University of Lubumbashi, Lubumbashi, Democratic Republic of the Congo
4. Department of Maternal and Child Health, Institut Supérieur des Techniques Médicales de Lubumbashi, Lubumbashi, Democratic Republic of the Congo,
5. Department of Pedicatrics, Faculty of Medicine, University of Lubumbashi, Lubumbashi, Democratic Republic of the Congo,