1. Department of Paediatrics and Adolescent Medicine; University of Erlangen-Nürnberg; Germany
2. Department of Nephrology and Hypertension; University of Erlangen-Nürnberg; Germany
3. Institute of Pathology; SALK and Medical University of Salzburg; Austria
4. Department of Nephropathology; University of Erlangen-Nürnberg; Germany
5. Department of Medicine III; LMU University of Munich; Germany