1. Beijing Advanced Innovation Centre for Biomedical Engineering; Key Laboratory for Biomechanics and Mechanobiology of Chinese Education Ministry; School of Biological Science and Medical Engineering; Beihang University; Beijing 10083 China
2. Beijing Key Laboratory for Design and Evaluation Technology of Advanced Implantable & Interventional Medical Devices; Beihang University; Beijing 10083 China
3. Institute of Cardiothoracic Surgery at Changhai Hospital; Second Military Medical University; Shanghai 200433 China
4. CAS Center for Excellence in Nanoscience; Beijing Key Laboratory of Micro-nano Energy and Sensor; Beijing Institute of Nanoenergy and Nanosystems; Chinese Academy of Sciences; Beijing 100083 China
5. College of Nanoscience and Technology; University of Chinese Academy of Sciences; Beijing 100049 China
6. National Research Center for Rehabilitation Technical Aids; Beijing 100176 China
7. School of Materials Science and Engineering; Georgia Institute of Technology; Atlanta GA 30332 USA