1. Novartis Pharmaceuticals Corporation; East Hanover New Jersey USA
2. Department of Nephrology, Charité Campus Mitte; Charité - Universitätsmedizin; Berlin Germany
3. Dieter Scheffner Center for Medical Education and Educational Research; Charité - Universitätsmedizin; Berlin Germany
4. Novartis Pharma AG; Basel Switzerland
5. Department of Clinical Pharmacology and Toxicology; Zurich University Hospital; Zurich Switzerland