1. Department of Malaria and Parasitic Diseases, National Institute of Health, Seoul 122-701, Korea.
2. Department of Parasitology, Inha University School of Medicine, Incheon 400-712, Korea.
3. Department of Parasitology, Hallym University College of Medicine, Chuncheon 200-702, Korea.
4. Department of Molecular Parasitology and Samsung Biomedical Research Institute, Sungkyunkwan University School of Medicine, Suwon 440-746, Korea.
5. Department of Parasitology, Institute of Health Sciences, Gyeongsang National University College of Medicine, Jinju 660-751, Korea.
6. Department of Social and Preventive Medicine, Inha University School of Medicine, Incheon 400-712, Korea.
7. 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.
8. Korea Association of Health Promotion, Seoul 157-704, Korea.
9. Centers for Disease Control and Prevention, Seoul 122-701, Korea.
10. Department of Preventive Medicine, Gachon University of Medicine and Science, Incheon 406-799, Korea.