1. Institut Pasteur in Cambodia, Réseau International des Instituts Pasteur, 5 Monivong Blvd., P.O. Box 983, Phnom Penh, Cambodia
2. Ministry of Health, Communicable Disease Control Department, 152-153 Kampuchea Krom Blvd., Phnom Penh, Cambodia
3. World Health Organization, 177-179 Pasteur Street, Phnom Penh, Cambodia
4. Cirad, UMR17, Cirad-Ird, TA-A17/G, Campus International de Baillarguet, 34398 Montpellier Cedex 5, France