1. Department of Biomedical Engineering and Mechanics, Virginia Tech, 495 Old Turner Street, Norris Hall, Blacksburg, Virginia 24060, USA
2. Department of Civil, Environmental and Ocean Engineering, Davidson Laboratory, Stevens Institute of Technology, 711 Hudson Street, Hoboken, New Jersey 07030, USA
3. Department of Mechanical Engineering, Virginia Tech, 635 Prices Fork Road, Goodwin Hall, Blacksburg, Virginia 24060, USA