1. Project Group Epidemiology of Highly Pathogenic Microorganisms; Robert Koch-Institute; Berlin Germany
2. Department of Primatology; Max Planck Institute for Evolutionary Anthropology; Leipzig Germany
3. University Montpellier 2; Montpellier France
4. Laboratoire National d‘appui au Développement Agricole/Laboratoire Central de Pathologie Animale; Bingerville Côte d'Ivoire
5. Taï Chimpanzee Project, CSRS; Abidjan Côte d'Ivoire