1. Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Scheeles Väg 2, Stockholm, Sweden
2. NJ Centre for Biomaterials, Rutgers University, 145 Bevier Road, Piscataway, New Jersey United States
3. Department of Materials, Department of Bioengineering, and Institute of Biomedical Engineering, Imperial College London, Exhibition Road, London, United Kingdom