1. Department of Clinical Pharmacology University Medical Center Goettingen Goettingen Germany
2. Central Institute for Clinical Chemistry and Laboratory Medicine Klinikum Stuttgart Stuttgart Germany
3. Department of Medical Statistics University Medical Center Goettingen Goettingen Germany
4. Department of Nephrology Transplant Center Klinikum Stuttgart Stuttgart Germany
5. Chronix Biomedical Goettingen Germany
6. Nephrology Center Stuttgart Stuttgart Germany
7. Department of Cellular and Molecular Pathology German Cancer Research Center Heidelberg Germany