1 National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing, China; School of Public Health and Social Work, Queensland University of Technology, Brisbane, QLD 4001, Australia. Electronic address: s.tong@qut.edu.au.
2 National Centre for Epidemiology and Population Health, The Australian National University, Canberra, ACT, Australia.
3 Center for Health and the Global Environment, University of Washington, Seattle, WA, USA.