1. Infectious Diseases Department, University Hospital Brugmann, Université Libre de Bruxelles, Brussels, Belgium
2. Aids Reference Laboratory, Centre Hospitalier Universitaire St. Pierre, Brussels, Belgium
3. Nephrology and Dialysis Department, University Hospital Brugmann, Université Libre de Bruxelles, Brussels, Belgium
4. Infectious Diseases Department, University Hospital St Pierre, Université Libre de Bruxelles, Brussels, Belgium