1 Department of Cardiology, University Heart Center, University Hospital Zurich, Zurich, Switzerland.
2 Department of Cardiology, University Heart Center, University Hospital Zurich, Zurich, Switzerland; University of Zürich, Zurich, Switzerland.
3 Department of Cardiology, University Heart Center, University Hospital Zurich, Zurich, Switzerland; University of Zürich, Zurich, Switzerland; Center for Integrative Human Physiology, University of Zurich, Zurich, Switzerland.