Department of Mechanical and Aerospace Engineering, Polytechnic University of Turin, Turin, Italy.|School of Mechanical Engineering, Purdue University, West Lafayette, Indiana, United States of America.|Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana, United States of America.|Department of Mechanical Engineering, Aragon Institute of Engineering Research (I3A), University of Zaragoza, Zaragoza, Spain.|Departments of Biological Engineering and Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts, United States of America.|Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana, United States of America.