1Department of Parasitology and Institute of Endemic Diseases, Seoul National University College of Medicine and SNUMMC, Seoul 110-799, Korea.
2Korea Association of Health, Seoul 157-016, Korea.
3Department of Parasitology, College of Medicine Hanyang University, Seoul 133-791, Korea.
4Guangxi Institute of Parasitic Diseases Control, Nanning, Guangxi, China.
5Liaoning Province Public Health and Anti-Epidemic Station, Shenyang, Liaoning, China. JFIF d d Ducky d qhttp://ns.adobe.com/xap/1.0/