1. School of Environment, Jinan University, Guangdong Guangzhou, P. R. China 511443
2. School of Civil and Environmental Engineering, Nanyang Technological University, Singapore, Singapore 639798
3. Residues and Resource Reclamation Centre, Nanyang Environment & Water Research Institute, Nanyang Technological University, Singapore, Singapore 637141
4. Singapore Phenome Center, Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, Singapore 636921