1. Institute for Molecular Cardiovascular Research (J.J.), University Hospital, Rheinisch-Westfälische Technische Hochschule Aachen (RWTH), Aachen, Germany.
2. School for Cardiovascular Diseases, Maastricht University, The Netherlands (J.J.).
3. Division of Nephrology and Clinical Immunology (J.F.), University Hospital, Rheinisch-Westfälische Technische Hochschule Aachen (RWTH), Aachen, Germany.
4. Department of Nephrology (D.F.), Saarland University Medical Centre, Homburg, Germany.
5. Department of Cardiology, Angiology and Intensive Care Medicine (M.B.), Saarland University Medical Centre, Homburg, Germany.
6. Department of Internal Medicine I (Cardiology) (N.M.), University Hospital, Rheinisch-Westfälische Technische Hochschule Aachen (RWTH), Aachen, Germany.