1. Institute for Laboratory Medicine, Microbiology & Infection Control, Northwest Medical Centre, Medical Faculty, Goethe University, Frankfurt/Main, Germany;
2. Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit (LGL), Oberschleissheim, Germany;
3. W. Harry Feinstone Department of Molecular Microbiology & Immunology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, USA