1. Hospital of St. John of God, Marschallgasse, Graz, Austria
2. Section of Infectious Diseases and Tropical Medicine, Department of Internal Medicine, Medical University of Graz, Graz, Austria
3. Clinical Institute of Medical and Chemical Laboratory Diagnostics, Medical University of Graz, Graz, Austria
4. Division of Infectious Diseases, Department of Medicine, University of California San Diego, San Diego, California
5. BioTechMed-Graz, Graz, Austria