1 Staff Office Strategic Medical Controlling, University Hospital Ulm, Faculty of Medicine, University of Ulm, Albert-Einstein-Allee 29, 89081, Ulm, Germany. ulf.dennler@uniklinik-ulm.de.
2 Department of Internal Medicine II, University Hospital Rechts der Isar, Technical University of Munich, School of Medicine, Ismaninger Str.22, 81675, Munich, Germany.
3 Department of Internal Medicine II, University Hospital Rechts der Isar, Technical University of Munich, School of Medicine, Ismaninger Str.22, 81675, Munich, Germany. christoph.spinner@tum.de.