1 Instutute of Biomedical Electronics, Faculty of Electrical Engineering and Information Technology, Vienna University of Technology (TU Wien), Vienna, Austria.
2 Division of Cardiology, Duke University Medical Center, Durham, NC, United States.
3 Duke Clinical Research Institute, Duke University, Durham, NC, United States.
4 Convergent Medical Technologies, Inc, New York, NY, United States.
5 Neurocomputing and Neurorobotics Research Group, Universidad Complutense de Madrid, Madrid, Spain.
6 Institute for Health Research (IdISSC), San Carlos Clinical Hospital, Madrid, Spain.