1. Centre for Communicable Diseases, International Centre for Diarrhoeal Disease Research, Dhaka, Bangladesh
2. Epidemiology Branch, Influenza Division, Centres for Disease Control and Prevention (CDC), Atlanta, GA, USA
3. Institute of Epidemiology, Disease Control and Research, Dhaka, Bangladesh
4. Global Disease Detection Branch, Division of Global Health Protection, Centres for Disease Control and Prevention (CDC), Atlanta, GA, USA