1. Department of Human and Animal Cell Lines; Leibniz-Institute DSMZ-German Collection of Microorganisms and Cell Cultures; Braunschweig; D-38124; Germany
2. Institute of Clinical Chemistry and Laboratory Diagnostics; Heinrich-Heine-University, Medical School; Düsseldorf; D-40225; Germany
3. Helmholtz Centre of Infection Research; Braunschweig; D-38124; Germany