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 , 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, 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