1. Institute of Materials Research and Engineering; A*STAR (Agency for Science, Technology and Research); 2 Fusionopolis Way, #08-03, Innovis Singapore 138634 Republic of Singapore
2. Department of Materials Science and Engineering; National University of Singapore; 9 Engineering Drive 1 Singapore 117576 Republic of Singapore
3. Singapore Eye Research Institute; 11 Third Hospital Avenue Singapore 168751 Republic of Singapore