1. Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Avenida da República (EAN), 2780-157 Oeiras, Portugal
2. Interfaculty Institute of Microbiology and Infection Medicine, Dept. of Microbial Bioactive Compounds, Cluster of Excellence Controlling Microbes to Fight Infection. University of Tuebingen, Auf der Morgenstelle 28, 72070 Tuebingen, Germany
3. Institute for Pharmaceutical Microbiology, University of Bonn, University Clinic Bonn, Meckenheimer Allee 168, 53115 Bonn, Germany
4. Institute of Microbiology and Infection Medicine, Dept. of Organismic Interactions, University of Tuebingen, Auf der Morgenstelle 28, 72070 Tuebingen, Germany