1. Department of Biology, Indiana University, Bloomington, Indiana, USA
2. Department of Life Sciences, MRC Centre for Molecular Bacteriology and Infection, Imperial College, London, United Kingdom
3. Institut Pasteur, Unité de Génétique des Biofilms, Département de Microbiologie, Paris, France
4. Department of Microbiology and Immunology, Loyola University Chicago, Maywood, Illinois, USA