1. Laboratorie of Molecular Genetics, Instituto de Tecnologia Química e Biológica (ITQB), Oeiras, Portugal.
2. Department of Clinical Microbiology, Hvidovre Hospital, Hvidovre, Denmark.
3. Laboratorie of Bacterial Evolution and Molecular Epidemiology, Instituto de Tecnologia Química e Biológica (ITQB), Oeiras, Portugal.
4. Laboratory of Microbiology, The Rockefeller University, New York, New York.
5. Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.