1. International Center for Multidisciplinary Research at the University of Lisala, Democratic Republic of the Congo,
2. Catholic University of Central Africa, Central Hospital, Yaounde, Cameroon,
3. Day Hospital, Central Hospital, Yaounde, Cameroon,
4. Department of Public Health, Faculty of Medicine and Pharmaceutical Sciences, University of Dschang, Cameroon,
5. Department of Public Health, School of Nursing and Public Health, University of KwaZulu Nathal, Durban, South Africa,
6. Texila American University, Democratic Republic of the Congo,
7. University Simon Kimbangu, Democratic Republic of the Congo,