1. Institute of Biomedical Engineering; Boğaziçi University; Rasathane St., Kandilli 34684, Istanbul Turkey
2. Northeastern University; School of Materials and Metallurgy; 110004, Shenyang China
3. Institute of Biomaterials; Department of Materials Science and Engineering, University of; Erlangen-Nuremberg; Cauerstrasse 6, 91058 Erlangen Germany