1. Department of Laboratory Medicine, Soonchunhyang University Seoul Hospital and Soonchunhyang University College of Medicine, Seoul, Korea.
2. Department of Pediatrics, Soonchunhyang University Seoul Hospital and Soonchunhyang University College of Medicine, Seoul, Korea.
3. Department of Laboratory Medicine and Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
4. Department of Laboratory Medicine and Genetics, Soonchunhyang University Bucheon Hospital and Soonchunhyang University College of Medicine, Bucheon, Korea.