1 Heart Research Institute, The University of Sydney, Camperdown, New South Wales, Australia; Charles Perkins Centre, The University of Sydney, Camperdown, New South Wales, Australia.
2 Heart Research Institute, The University of Sydney, Camperdown, New South Wales, Australia; Charles Perkins Centre, The University of Sydney, Camperdown, New South Wales, Australia; Coulter Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, Georgia; Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Georgia. Electronic address: cheng.zhu@bme.gatech.edu.