1. Department of Environmental Sanitation, Faculty of Nutrition and Food Science, Patuakhali Science and Technology University, Patuakhali, Bangladesh
2. International Centre for Diarrhoeal Disease Research, Bangladesh, Dhaka, Bangladesh
3. Department of Food Microbiology, Faculty of Nutrition and Food Science, Patuakhali Science and Technology University, Patuakhali, Bangladesh
4. Health Adviser, WaterAid Bangladesh