1. Walter Reed Johns Hopkins Cameroon Program, Yaoundé, Cameroon;
2. Tufts University School of Veterinary Medicine, North Grafton, Massachusetts, USA;
3. Walter Reed Johns Hopkins Cameroon Program, Yaoundé, Cameroon;University of Yaoundé, Yaoundé, Cameroon;
4. Consortium for Conservation Medicine, New York, New York, USA;
5. Johns Hopkins University, Baltimore, Maryland, USA;
6. Ministry of Livestock, Fisheries and Animal Industries, Yaoundé, Cameroon