1. Department of Nephrology, Hannover Medical School, Hannover, Germany
2. Astellas Pharma Europe Ltd., Addlestone, United Kingdom
3. Astellas Pharma GmbH, Munich, Germany
4. Department of Nephrology and Hypertension, Universitätsklinikum Erlangen und Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany