1. Department of Internal Medicine and Infectious Disease, Universiteit Ziekenhuis Brussel (Uz Brussel), Brussels, Belgium
2. Department of Internal Medicine and Infectious Disease, Centre Hospitalier Universitaire (Chu) Brugmann, Brussels, Belgium
3. Department of Internal Medicine and Infectious Disease, Centre Hospitalier Universitaire (Chu) Saint Pierre, Brussels Belgium
4. Environmental Health Research Centre Public Health School, Université Libre De Bruxelles (Ulb), Brussels, Belgium
5. Department of Microbiology and Belgian Reference Centrum for LegionellaUniversiteit Ziekenhuis Brussel (Uz Brussel), Brussels, Belgium
6. Department of Microbiology, Laboratoire Hospitalier Universitaire De Bruxelles (Lhub), Brussels, Belguim