1. School of Environment and Guangdong Key Laboratory of Environmental Pollution and Health, Jinan University, Guangzhou 510632, China
2. Department of Environmental and Occupational Health, School of Public Health, Sun Yat-Sen University, Guangzhou 510080, China
3. School of Public and Environmental Affairs, Indiana University, Bloomington, Indiana 47405, United States
4. School of Civil and Environmental Engineering, Nanyang Technological University, Singapore 639798, Singapore