1. Robert Koch Institute, FG13 Division of Nosocomial Pathogens and Antibiotic Resistances, Department of Infectious Diseases, Wernigerode Branch, Wernigerode, Germany
2. Leibniz Institute DSMZ, Braunschweig, Germany
3. German Centre for Infection Research (DZIF), Partner Site Hannover-Braunschweig, Braunschweig, Germany