1 Department of Laboratory Medicine, University Hospitals Leuven, Herestraat 49, B-3000, Leuven, Belgium.
2 Laboratory for Clinical Infectious and Inflammatory Disorders, Department of Microbiology, Immunology and Transplantation, KU Leuven, Leuven, Belgium.
3 Department of Internal Medicine, University Hospitals Leuven, Leuven, Belgium.
4 Department of Laboratory Medicine, University Hospitals Leuven, Herestraat 49, B-3000, Leuven, Belgium. Xavier.bossuyt@uzleuven.be.
5 Clinical and Diagnostic Immunology, Department of Microbiology, Immunology and Transplantation, KU Leuven, Leuven, Belgium. Xavier.bossuyt@uzleuven.be.