1. Division of Tropical Medicine and Infectious Diseases; University of Rostock Medical School; Rostock Germany
2. Regional Hospital Limbe; Limbe Cameroon
3. Ministry of Health; Yaoundé Cameroon
4. Gesellschaft für Internationale Zusammenarbeit; Yaoundé Cameroon
5. Institute of Biostatistics and Informatics in Medicine and Ageing Research; University of Rostock Medical School; Rostock Germany