1 Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering, Beihang University, Beijing 100191, China.
2 School of Mechanical & Aerospace Engineering, Queen's University of Belfast, Belfast BT7 1NN, Northern Ireland.
3 Translational Tissue Engineering Center and Whitaker Biomedical Engineering Institute, Johns Hopkins University, Baltimore, MD 21218, USA.
4 College of Engineering, University of Arizona, Tucson, AZ 85721, USA.