1 Department of Nephrology, Limassol General Hospital, State Health Services Organization, Limassol, Cyprus.
2 Department of Basic and Clinical Sciences, University of Nicosia Medical School, Nicosia, Cyprus.
3 Division of Nephrology, Department of Internal Medicine IV, Hospital of the Ludwig-Maximilians-University, Munich, Germany.
4 Department of Pathology and Medical Biology, University of Groningen, University Medical Center, Groningen, The Netherlands.
5 Center of Expertise for Lupus, Vasculitis and Complement-mediated Systemic Disease (LuVaCs), Department of Internal Medicine - Section Nephrology, Leiden University Medical Center, Leiden, The Netherlands.
6 Department of Nephrology, Leiden University Medical Center, Leiden, The Netherlands.
7 Nephrology Unit, Hospital Fernandez, Buenos Aires, Argentina.
8 Division of Nephrology, The Ohio State University Wexner Medical Center, Columbus, Ohio.
9 Department of Internal Medicine IV, Nephrology and Hypertension, Medical University Innsbruck, Innsbruck, Austria.