1. Division of Parasitology, Department of Microbiology, New York University Medical Center, New York 10016
2. Department of Medical Entomology, Mahidol University, 42016 Rajvthi Road, Bangkok 10400, Thailand
3. Department of Microbiology, New York University Medical Center, New York 10016
4. Immunology Unit, Noguchi Memorial Institute for Medical Research, University of Ghana, Legon, Ghana