1 Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, Beijing Advanced Innovation Centre for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, Beijing 100191, China.
2 Beijing Advanced Innovation Centre for Biomedical Engineering, Beihang University, Beijing 102402, China.
3 Beijing Key Laboratory of Rehabilitation Technical Aids for Old-Age Disability, Key Laboratory of Technical Aids Analysis and Identification Key Laboratory of Ministry of Civil Affairs, National Research Centre for Rehabilitation Technical Aids, Beijing 100176, China.