1. Section Tropical Medicine; University Medical Center Hamburg-Eppendorf; Hamburg Germany
2. Clinical Research Group; Bernhard Nocht Institute for Tropical Medicine; Hamburg Germany
3. Kumasi Center for Collaborative Research in Tropical Medicine; Kumasi Ghana
4. Infectious Diseases Epidemiology; Bernhard Nocht Institute for Tropical Medicine; Hamburg Germany
5. St. Michael's Hospital; Pramso Ghana
6. Campus Hospital; Kwame Nkrumah University of Science and Technology; Kumasi Ghana
7. Faculty of Medicine; Kwame Nkrumah University of Science and Technology; Kumasi Ghana