1. Department of Mechanical Engineering, The University of Akron, Akron, OH 44325
2. Department of Biomedical Engineering, The University of Akron, Akron, OH 44325
3. Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, ON M5S3G8, Canada
4. Department of Mechanical Engineering, The University of Akron, Akron, OH 44325;