1. Institute of Biomaterials, Department of Materials Science and Engineering, University of Erlangen-Nuremberg, Cauerstrasse 6, Erlangen 91058, Germany
2. Faculty of Engineering, Department of Mechanical, Materials and Manufacturing Engineering, University of Nottingham, Nottingham NG 7 2RD, United Kingdom
3. National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou 450002, China