1. Department of Microbiology, LHUB-ULB, National Reference Centre for Staphylococcus aureus and other species, Université libre de Bruxelles , route de Lennik 808, 1070 Brussels , Belgium
2. Centre for Environmental Health and Occupational Health, Public Health School, Université libre de Bruxelles , route de Lennik 808, 1070 Brussels , Belgium
3. Scientific Directorate of Epidemiology and Public Health, Sciensano , J. Wytsmanstraat 14, 1050 Brussels , Belgium