1. Tissue and Therapeutic Engineering Laboratory, Division of Biomedical Sciences, Johns Hopkins in Singapore, Singapore.
2. Department of Physiology, National University of Singapore, Singapore.
3. Institute of Bioengineering and Nanotechnology, Singapore.
4. Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, Maryland.
5. Department of Biomedical Engineering, Johns Hopkins University School of Medicine, Baltimore, Maryland.