1. Department of Pediatrics, College of Medicine, Yeungnam University, Daegu, Korea.
2. Department of Pediatrics, Daegu Fatima Hospital, Kyungpook National University School of Medicine, Daegu, Korea.
3. Department of Clinical Pathology, Kyungpook National University School of Medicine, Daegu, Korea.
4. Department of Laboratory Medicine, College of Medicine, Yeungnam University, Daegu, Korea.