1. National Center for Laboratory and Epidemiology, Department of Communicable Disease Control Ministry of Health Vientiane Lao PDR
2. World Health Organization Vientiane Lao PDR
3. U. S. Centers for Disease Control and Prevention Atlanta Georgia USA
4. Epidemiology Unit Provincial Health Department Luang Prabang Lao PDR
5. National Animal Health Laboratory, Department of Livestock and Fisheries Ministry of Agriculture and Forestry Vientiane Lao PDR