1 Department of Nephrology and Arterial Hypertension, Universitair Ziekenhuis Brussel (UZ Brussel), Vrije Universiteit Brussel (VUB), Brussels, Belgium. Electronic address: Karlien.Francois@uzbrussel.be.
2 Laboratory of Nephrology, Department of Microbiology, Immunology and Transplantation, KU Leuven, Leuven, Belgium; Nephrology Unit, University Hospitals Leuven, Leuven, Belgium.