1. Department of Community and Global Health, Graduate School of Medicine The University of Tokyo Tokyo Japan
2. Nutrition and Clinical Services Division International Centre for Diarrhoeal Disease Research Bangladesh
3. Infectious Diseases Division International Centre for Diarrhoeal Disease Research Bangladesh
4. Department of Developmental Medical Sciences, Graduate School of Medicine The University of Tokyo Tokyo Japan
5. Centre for Equity and Health System International Centre for Diarrhoeal Disease Research Bangladesh
6. Department of Education for Childcare, Faculty of Child Studies Tokyo Kasei University Tokyo Japan