1. Institute of Pharmacology and Toxicology, University Medical Center Göttingen , Robert-Koch-Str. 40, 37075 Göttingen , Germany
2. DZHK (German Centre for Cardiovascular Research), Partner Site Göttingen , Germany
3. Cluster of Excellence ‘Multiscale Bioimaging: from Molecular Machines to Networks of Excitable Cells’ (MBExC), University of Göttingen , Germany
4. Department of Physiology, Pennsylvania Muscle Institute, University of Pennsylvania Perelman School of Medicine , Philadelphia , USA