1. a Friedrich-Baur Research Institute for Biomaterials, University of Bayreuth, Ludwig-Thoma Str. 36c, 95447 Bayreuth, Germany
2. b Friedrich-Baur Research Institute for Biomaterials, University of Bayreuth, Ludwig-Thoma Str. 36c, 95447 Bayreuth, Germany
3. c Department of Polymer Materials, University of Bayreuth, Universitätstr. 30, 95447 Bayreuth, Germany
4. d Friedrich-Baur Research Institute for Biomaterials, University of Bayreuth, Ludwig-Thoma Str. 36c, 95447 Bayreuth, Germany