1 Department of Internal Medicine IV, Nephrology and Hypertension, Medical University Innsbruck, Innsbruck, Austria.
2 Department of Health, Medicine and Caring Sciences, Linköping University, Linköping, Sweden.
3 Department of Renal Medicine, Karolinska University Hospital and CLINTEC Karolinska Institutet, Stockholm, Sweden.
4 Department of Nephrology, Instituto de Investigación Hospital 12 de Octubre (imas12), Madrid, Spain.
5 Division of Nephrology, RWTH Aachen University Hospital, Aachen, Germany.
6 Department of Nephrology, Limassol General Hospital, State Health Services Organization, Limassol, Cyprus.
7 University of Nicosia Medical School, Nicosia, Cyprus.
8 Medical School, National and Kapodistrian University of Athens, Athens, Greece.
9 Department of Immunology, Aziz Sancar Institute of Experimental Medicine, Istanbul University, Istanbul, Turkey.
10 Cork University Hospital, University College Cork, Cork, Ireland.
11 Glasgow Renal and Transplant Unit, Queen Elizabeth University Hospital, Glasgow, UK.
12 Center of Expertise for Lupus-, Vasculitis- and Complement-Mediated Systemic Diseases (LuVaCs), Department of Internal Medicine - Nephrology Section, Leiden University Medical Center, Leiden, The Netherlands.
13 Division of Nephrology, Department of Internal Medicine IV, Hospital of the Ludwig-Maximilians-University, Munich, Germany.