1 Inherited Kidney Diseases, Nephrology Department, Fundació Puigvert, Institut d'Investigacions Biomèdiques (IIB-Sant Pau), Department of Medicine, Universitat Autonoma de Barcelona (UAB), Spain.
2 Department of Internal Medicine IV, Nephrology and Hypertension, Medical University Innsbruck, Innsbruck, Austria.
3 Department of Pathology and Medical Biology, University of Groningen, University Medical Center, Groningen, The Netherlands.