1. Department of Laboratory Medicine & Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
2. Department of Laboratory Medicine, CHA Gangnam Medical Center, CHA University School of Medicine, Seoul, Korea
3. Department of Pediatrics, College of Medicine, Inha University Hospital, Incheon, Korea
4. Korea Hemophilia Foundation, Seoul, Korea
5. Samsung Biomedical Research Institute, Samsung Medical Center, Seoul, Korea
6. Department of Pediatrics, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Korea