1 Department of Medicine II, Medical Center University of Freiburg, Faculty of Medicine, University of Freiburg, Hugstetter Str. 55, 79106 Freiburg, Germany; Berta-Ottenstein Programme, Faculty of Medicine, University of Freiburg, Germany. Electronic address: dominik.bettinger@uniklinik-freiburg.de.
2 Department of Medicine II, Medical Center University of Freiburg, Faculty of Medicine, University of Freiburg, Hugstetter Str. 55, 79106 Freiburg, Germany.