1. Department of Bioengineering School of Engineering The University of Tokyo 7‐3‐1 Hongo Bunkyo‐ku Tokyo 113‐8656 Japan
2. Department of Materials Engineering School of Engineering The University of Tokyo 7‐3‐1 Hongo Bunkyo‐ku Tokyo 113‐8656 Japan
3. Department of Immunology, Genetics and Pathology (IGP) Uppsala University Dag Hammarskjölds väg 20 Uppsala SE‐751 85 Sweden
4. Linnaeus Center of Biomaterials Chemistry Linnaeus University Kalmar SE‐391 82 Sweden