1. Department of Parasitology and Tropical Medicine, Seoul National University College of Medicine, and Institute of Endemic Diseases, Seoul National University Medical Research Center, Seoul 110-799, Korea.
2. Department of Parasitology, Yonsei University College of Medicine, Seoul 120-752, Korea.
3. Department of Parasitology, Chungbuk National University College of Medicine, Cheongju 361-763, Korea.
4. Department of Microbiology and Immunology, Eulji University School of Medicine, Daejeon 301-746, Korea.
5. Malaria Center, Provincial Health Department, Luangprabang, Lao PDR.
6. Department of Hygiene and Prevention, Ministry of Public Health, Vientiane, Lao PDR.
7. Department of Parasitology, Korea University College of Medicine, Seoul 136-705, Korea.