1. Department of Surgery, University of Minnesota, Minneapolis, MN 55455, USA
2. Department of Cardiology and Angiology, University Hospital Magdeburg, Otto-von-Guericke-Universitӓt Magdeburg, Saxony-Anhalt 39106, Germany
3. Institute for Engineering in Medicine, University of Minnesota, Minneapolis, MN 55455, USA
4. Department of Biomedical Engineering, University of Minnesota, Minneapolis, MN 55455, USA