1. Department of Bioengineering, J. B. Speed School of Engineering University of Louisville Louisville Kentucky USA
2. Division of Cardiovascular Disease, Heersink School of Medicine University of Alabama at Birmingham Birmingham Alabama USA
3. Department of Biomedical Engineering, School of Engineering and Heersink School of Medicine University of Alabama at Birmingham Birmingham Alabama USA
4. Department of Bioengineering Lehigh University Bethlehem Pennsylvania USA
5. Division of Cardiothoracic Surgery, Department of Surgery, Heersink School of Medicine University of Alabama at Birmingham Birmingham Alabama USA
6. Department of Materials Science and Engineering Lehigh University Bethlehem Pennsylvania USA