Internal Medicine III - Cardiology, Angiology and Intensive Care Medicine, Saarland University Medical Center, Homburg, Germany. Internal Medicine IV - Nephrology and Hypertension, Saarland University Medical Center, Homburg, Germany. Institute for Medical Biometry, Epidemiology and Medical Informatics, Saarland University Medical Center, Homburg, Germany. Department of Medicine and Pathology, University of California, Los Angeles, California. Ageplesion Markus Krankenhaus, Frankfurt (Main), Germany.