1. School of Science and Engineering, University of Dundee, Dundee DD1 4HN, U.K.
2. Nanochemistry and Nanoengineering, Department of Chemistry and Materials Science, School of Chemical Engineering, Aalto University, Espoo 02150, Finland
3. Institute of Biomaterials, Department of Materials Science and Engineering, University of Erlangen-Nuremberg, Erlangen 91058, Germany
4. Centre for the Cellular Microenvironment, University of Glasgow, Glasgow 11 6EW, U.K.
5. Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing Medical University, Nanjing 210029, China
6. Department of Oral and Maxillofacial Surgery, Stomatological Hospital, Nanjing Medical University, Nanjing 210029, China