1. a Centre for Clinical Epidemiology and Population Health (CCEB) , The University of Newcastle , NSW , Australia
2. b National Centre for Epidemiology and Biostatistics (NCEPH) , The Australian National University , Canberra , Australia
3. c National Research Centre for Environmental Toxicology (NRCET) , The University of Queensland , Brisbane , Australia
4. d Department of Epidemiology and Preventive Medicine , Monash University , Melbourne , Australia
5. e School of Rural Health , Monash University , Bendigo , VIC , Australia
6. f Mitra and Associates , Dhaka , Bangladesh
7. g NGO Forum for Drinking Water Supply & Sanitation