1 Institute for Cardiovascular Physiology, University Medical Center Göttingen, Göttingen, Germany.
2 German Center for Cardiovascular Research (DZHK), Partner site Göttingen, Göttingen, Germany.
3 Cluster of Excellence "Multiscale Bioimaging: from Molecular Machines to Networks of Excitable Cells" (MBExC), University of Göttingen, Göttingen, Germany.
4 Institute of Clinical Physiology (IFC-CNR), Florence, Italy.
5 Institute for Experimental Cardiovascular Medicine, University of Freiburg, Freiburg im Breisgau, Germany.