1. Department of Life Sciences, University of Trieste, Trieste, Italy;
2. Department of Human Pathology, University of Palermo, Palermo, Italy;
3. Department of Science and Biomedical Technology, University of Udine, Udine, Italy;
4. Institute of Molecular Systems Biology, Eidgenössische Technische Hochschule (ETH) Zürich, Zürich, Switzerland; and
5. Division of Hygiene and Medical Microbiology, Innsbruck Medical University, Innsbruck, Austria