1. 1Central Unit for Animal Research and Animal Welfare Affairs, University Hospital, Heinrich - Heine - University, Geb. 22.22, Universitätsstr. 1, 40225 Düsseldorf, Germany
2. 2Leibniz Institute DSMZ - German Collection of Microorganisms and Cell Cultures, Inhoffenstraße 7B, 38124 Braunschweig, Germany