1. Center for Sustainable Materials (SusMat), School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
2. School of Biological Sciences, Nanyang Technological University, Singapore 637551, Singapore
3. Department of Health Sciences and Technology, ETH Zürich, Zürich 8092, Switzerland
4. Departments of Biomedical Engineering and Materials Science & Engineering, University of California, Davis, California 95616, United States