1. Molecular and Biomaterials Cluster, Institute of Materials Research and Engineering, Singapore.
2. Department of Physiology and National University Medical Institutes, Faculty of Medicine, National University of Singapore, Singapore
3. Department of Chemical and Environmental Engineering, National University of Singapore, Singapore
4. Molecular and Biomaterials Cluster, Institute of Materials Research and Engineering, Singapore
5. Molecular and Biomaterials Cluster, Institute of Materials Research and Engineering, Singapore and Department of Biomedical Engineering, Johns Hopkins University, Baltimore, Maryland.
6. Molecular and Biomaterials Cluster, Institute of Materials Research and Engineering, Singapore and Department of Physiology and National University Medical Institutes, Faculty of Medicine, National University of Singapore, Singapore.