1. Department of Entomology, Armed Forces Research Institute of Medical Sciences, Bangkok, Thailand.
2. Department of Entomology, Walter Reed Army Institute of Research, Washington, DC 20307-5100
3. Department of Immunology, Walter Reed Army Institute of Research, Washington, DC 20307-5100.
4. Laboratory of Parasitic Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892.
5. Malaria Division, Ministry of Public Health, Bangkok 10200, Thailand.