1. Bernhard Nocht Institute for Tropical Medicine, Hamburg, Germany
2. Medical Mission Hospital, Department for Tropical Medicine, Würzburg, Germany
3. Medizinische Klinik 1, Klinikum Saarbrücken, Saarbrücken, Germany
4. Department of Infectious Diseases and Tropical Medicine, Section of International Medicine and Public Health, University of Munich, Munich, Germany
5. Tropenklinik Paul-Lechler-Hospital, Department of Tropical Medicine, Tübingen, Germany