1. National Center for Laboratory and Epidemiology; Vientiane Lao PDR
2. Virology Unit; Institut Pasteur in Cambodia; Réseau International des Instituts Pasteur; Phnom Penh Cambodia
3. Institut Pasteur in Laos; Réseau International des Instituts Pasteur; Vientiane Lao PDR
4. Department of Internal Medicine; Setthathirath Hospital; Vientiane Lao PDR