1. Health Systems and Population Studies Division, International Centre for Diarrhoeal Disease Research, Bangladesh (icddr,b), Dhaka, Bangladesh
2. Department of Learning, Informatics, Management and Ethics (LIME), Karolinska Institutet, Stockholm, Sweden
3. Department of Tropical Disease Biology, Liverpool School of Tropical Medicine, Liverpool, UK
4. Department of Population Medicine and Diagnostic Sciences, Cornell University, College of Veterinary Medicine, Ithaca, NY, USA
5. Department of Development and Sustainability, Asian Institute of Technology, Bangkok, Thailand
6. Centre for Population Change, Southampton, UK