1. Ecosystem Change and Population Health Research Group, School of Public Health and Social Work, Queensland University of Technology, Brisbane, Queensland, Australia
2. National Centre for Epidemiology and Population Health, Australian National University, Canberra, Australian Capital Territory, Australia
3. Key Laboratory of Digestive System Tumors of Gansu Province, Second Hospital of Lanzhou University, Lanzhou, China
4. Center for Health and the Global Environment, University of Washington, Seattle, Washington, USA