1. Department of Pediatrics, Dong-A University, College of Medicine, Busan, Korea
2. Department of Laboratory Medicine, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Seongnam, Department of Pediatrics, Cheongju, Korea
3. Keimyung University School of Medicine, Keimyung University Dongsan Hospital, Cheongju, Korea
4. Yeungnam University Medical Center, Daegu, Department of Laboratory Medicine, Cheongju, Korea
5. Chungbuk National University Hospital, Cheongju, Korea
6. Dong-A University, College of Medicine, Busan, Department of Pediatrics, Seoul, Korea
7. Sungkyunkwan University School of Medicine, Seoul, Korea
8. Seoul National University College of Medicine, Seoul National University Bundang Hospital, Seongnam, Korea