1. Department of Pharmaceutical Biology, Pharmaceutical Institute, University of Tübingen, Tübingen, Germany
2. German Centre for Infection Research (DZIF), Partner Site Tübingen, Tübingen, Germany
3. Department of Microbial Ecology, Netherlands Institute of Ecology (NIOO-KNAW), Wageningen, The Netherlands
4. Institute of Biology, Leiden University, Leiden, The Netherlands