1. Department of Pediatrics, College of Medicine, Dankook University, Cheonan, Korea.
2. Department of Clinical Pathology, College of Medicine, Dankook University, Cheonan, Korea.
3. Department of Internal Medicine, College of Medicine, Dankook University, Cheonan, Korea.
4. Department of Parasitology, College of Medicine, Dankook University, Cheonan, Korea.
5. Department of Pediatrics, College of Medicine, The Catholic University of Korea, Seoul, Korea.