1. Grace Community Health and Development Association, P. O. Box 15, Kumba, Southwest Region, Cameroon
2. Mbonge District Hospital, Mbonge, South West Region, Cameroon
3. Faculty of Health Sciences, University of Buea, Buea, Cameroon
4. Health and Empowerment Foundation, Kumba, Cameroon
5. Faculty of Pharmacy and Pharmaceutical Sciences, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
6. Wum District Hospital, Wum, Northwest Region, Cameroon