1. Department of Chemical and Biomolecular Engineering; National University of Singapore; 4 Engineering Drive 4 Singapore 117585 Singapore
2. Saw Swee Hock School of Public Health, National University of Singapore; MD3 16 Medical Drive Singapore 117597 Singapore
3. NUS Environmental Research Institute, National University of Singapore; 5A Engineering Drive 1 Singapore 117411 Singapore
4. PUB; 40 Scotts Road Singapore 228231 Singapore