Dresden University of Technology - Department of Internal Medicine III, Albert-Ludwigs University of Freiburg, University Hospital Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, University of Münster - University Hospital Muenster, University Hospital Erlangen, University of Münster - University Hospital Muenster, Ludwig Maximilian University of Munich (LMU) - University Hospital of Munich, University of Duisburg-Essen - Department of Infectious Diseases, Westpfalz Hospital, University Hospital Regensburg - Department of Nephrology, Heidelberg University - Faculty of Medicine, Heidelberg University - University Hospital Heidelberg, University of Cologne - University Hospital of Cologne, - Würzburg University Medical Centre, Johannes Gutenberg University Mainz - University Medical Center, Albert-Ludwigs University of Freiburg, Dresden University of Technology - Faculty of Medicine Carl Gustav Carus and Dresden University of Technology - Department of Internal Medicine III