1. Division of Nephrology; Department of Internal Medicine; Robert-Bosch Hospital; Stuttgart Germany
2. Margarete-Fischer-Bosch Institute of Clinical Pharmacology; University of Tuebingen; Stuttgart Germany
3. Division of Pathology; Department of Diagnostic Medicine; Robert-Bosch Hospital; Stuttgart Germany
4. Division of Gastroenterology and Hepatology; Department of Internal Medicine; Robert-Bosch Hospital; Stuttgart Germany
5. Department of Pathology, Nephropathology; University of Erlangen-Nuernberg; Erlangen Germany